In mice, the agouti gene determines coat color. This gene has two incompletely dominant alleles: black (A^B) and yellow (A^Y). Heterozygous mice express a mix of the black and yellow coat color, which we call "agouti". However, homozygous yellow mice (A^YA^Y) develop obesity, diabetes, and tumors, and often do not survive to birth.

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In plants known as "four o' clocks", the allele for the dominant red flower color is Incompletely Dominant over the allele for white flowers. A gardener chooses to cross a heterozygous pink-flowered plant with another heterozygous pink-flowered plant.

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From these two heterozygous parents, % will be red.

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From these two heterozygous parents, % will be pink.

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From these two heterozygous parents, % will be white.

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A woman who is AABb mates with a man who is Aabb.

What are the ratios of the possible genotypes of their offspring?

AABb:

AaBb:

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In rabbits, white coat color (C^W) and black coat color (C^B) are codominant, and both of these alleles are dominant over albino (c). Heterozygotes (C^WC^B) are spotted.
What are the expected phenotypes from the offspring of a heterozygous black coat rabbit (C^Bc) and a homozygous white coat rabbit (C^WC^W) ?

100% black coat

50% spotted, 50% white coat

50% white coat, 50% black coat

25% white coat, 50% spotted, 25% albino

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In a species of birds, blue feathers (B) are incompletely dominant to the gene for white feathers (W). Individuals that are heterozygous (BW) have blue-tipped feathers.
A bird with blue-tipped feathers is crossed with a white bird. What is the chance that the offspring will have blue feathers?

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The following cross is made between two pea plants:
TTYy x Ttyy
What percentage of the offspring will be TTYy?

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Body color for horses is determined by two Incompletely dominant alleles: brown (B^B) and cream (B^C). When a horse is heterozygous for body color, it is described as palomino (B^BB^C).
What is the expected phenotypic ratio if two palomino horses mate?

2 brown : 2 cream

3 brown : 1 cream

4 palomino

1 brown : 2 palomino : 1 cream

In humans, there are four types of blood: Type A, Type B, Type AB, and Type O. The alleles A (I^A) and B (I^B) are codominant to each other, and the O allele ( i ) is recessive to both A and B. This means a person with Type A blood could be I^AI^A or I^Ai.

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Select all genotypes that represent Type B blood.

I^BI^B

I^Bi

i i

I^AI^B

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In humans, the alleles for blood type are designated I^A (type A blood), I^B (type B blood), I^AI^B (type AB blood), and i (type O blood).

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What are the expected phenotypes of the kids from a heterozygous A parent (I^Ai) and a heterozygous B parent (I^Bi)?

Type A:

Type AB:

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In the 1950s, a young woman sued film star Charlie Chaplin for parental support of her child. Charlie Chaplin was documented as having Type AB blood. The mother had type A blood, and her son had type O blood.

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Use the "edit background" feature to show the possible crosses of Charlie and the mother.

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The judge ruled in favor of the mother, and Charlie Chaplin had to pay child support for 18 years. Was the judge correct in his decision based on blood typing evidence? Use your Punnett squares from the previous question to support your answer.

Copy of Thursday (01/25) - Dihybrids and Non-Mendelian Genetics Practice (1/17/2025)

Copy of Thursday (01/25) - Dihybrids and Non-Mendelian Genetics Practice (1/17/2025)

In plants known as "four o' clocks", the allele for the dominant red flower color is Incompletely Dominant over the allele for white flowers. A gardener chooses to cross a heterozygous pink-flowered plant with another heterozygous pink-flowered plant.

In a species of birds, blue feathers (B) are incompletely dominant to the gene for white feathers (W). Individuals that are heterozygous (BW) have blue-tipped feathers.
A bird with blue-tipped feathers is crossed with a white bird. What is the chance that the offspring will have blue feathers?

The following cross is made between two pea plants:
TTYy x Ttyy
What percentage of the offspring will be TTYy?

TTYy x Ttyy

Body color for horses is determined by two Incompletely dominant alleles: brown (B^B) and cream (B^C). When a horse is heterozygous for body color, it is described as palomino (B^BB^C).
What is the expected phenotypic ratio if two palomino horses mate?

In humans, there are four types of blood: Type A, Type B, Type AB, and Type O. The alleles A (I^A) and B (I^B) are codominant to each other, and the O allele ( i ) is recessive to both A and B. This means a person with Type A blood could be I^AI^A or I^Ai.

Select all genotypes that represent Type B blood.

In humans, the alleles for blood type are designated I^A (type A blood), I^B (type B blood), I^AI^B (type AB blood), and i (type O blood).

In the 1950s, a young woman sued film star Charlie Chaplin for parental support of her child. Charlie Chaplin was documented as having Type AB blood. The mother had type A blood, and her son had type O blood.

Use the "edit background" feature to show the possible crosses of Charlie and the mother.

The judge ruled in favor of the mother, and Charlie Chaplin had to pay child support for 18 years. Was the judge correct in his decision based on blood typing evidence? Use your Punnett squares from the previous question to support your answer.

If two heterozygous agouti mice are crossed, what percentage of offspring will NOT survive?

What is the phenotypic ratio of the surviving mice from the cross above?

If a homozygous black mouse is crossed with a heterozygous agouti mouse, what percentage of offspring will be heterozygous?

In plants known as "four o' clocks", the allele for the dominant red flower color is Incompletely Dominant over the allele for white flowers. A gardener chooses to cross a heterozygous pink-flowered plant with another heterozygous pink-flowered plant.

In a species of birds, blue feathers (B) are incompletely dominant to the gene for white feathers (W). Individuals that are heterozygous (BW) have blue-tipped feathers.
A bird with blue-tipped feathers is crossed with a white bird. What is the chance that the offspring will have blue feathers?

The following cross is made between two pea plants:
TTYy x Ttyy
What percentage of the offspring will be TTYy?

TTYy x Ttyy

Body color for horses is determined by two Incompletely dominant alleles: brown (B^B) and cream (B^C). When a horse is heterozygous for body color, it is described as palomino (B^BB^C).
What is the expected phenotypic ratio if two palomino horses mate?

In humans, there are four types of blood: Type A, Type B, Type AB, and Type O. The alleles A (I^A) and B (I^B) are codominant to each other, and the O allele ( i ) is recessive to both A and B. This means a person with Type A blood could be I^AI^A or I^Ai.

Select all genotypes that represent Type B blood.

Select all genotypes that represent Type O blood.

Which genotype represents type AB blood?

In humans, the alleles for blood type are designated I^A (type A blood), I^B (type B blood), I^AI^B (type AB blood), and i (type O blood).

In the 1950s, a young woman sued film star Charlie Chaplin for parental support of her child. Charlie Chaplin was documented as having Type AB blood. The mother had type A blood, and her son had type O blood.

Use the "edit background" feature to show the possible crosses of Charlie and the mother.

The judge ruled in favor of the mother, and Charlie Chaplin had to pay child support for 18 years. Was the judge correct in his decision based on blood typing evidence? Use your Punnett squares from the previous question to support your answer.

If two heterozygous agouti mice are crossed, what percentage of offspring will NOT survive?

What is the phenotypic ratio of the surviving mice from the cross above?

If a homozygous black mouse is crossed with a heterozygous agouti mouse, what percentage of offspring will be heterozygous?

Select all genotypes that represent Type O blood.

Which genotype represents type AB blood?

Copy of Thursday (01/25) - Dihybrids and Non-Mendelian Genetics Practice (1/17/2025)

Copy of Thursday (01/25) - Dihybrids and Non-Mendelian Genetics Practice (1/17/2025)

In plants known as "four o' clocks", the allele for the dominant red flower color is Incompletely Dominant over the allele for white flowers. A gardener chooses to cross a heterozygous pink-flowered plant with another heterozygous pink-flowered plant.

In a species of birds, blue feathers (B) are incompletely dominant to the gene for white feathers (W). Individuals that are heterozygous (BW) have blue-tipped feathers.A bird with blue-tipped feathers is crossed with a white bird. What is the chance that the offspring will have blue feathers?

The following cross is made between two pea plants:TTYy x TtyyWhat percentage of the offspring will be TTYy?

TTYy x Ttyy

Body color for horses is determined by two Incompletely dominant alleles: brown (BB) and cream (BC). When a horse is heterozygous for body color, it is described as palomino (BBBC).What is the expected phenotypic ratio if two palomino horses mate?

In humans, there are four types of blood: Type A, Type B, Type AB, and Type O. The alleles A (IA) and B (IB) are codominant to each other, and the O allele ( i ) is recessive to both A and B. This means a person with Type A blood could be IAIA or IAi.

Select all genotypes that represent Type B blood.

In humans, the alleles for blood type are designated IA (type A blood), IB (type B blood), IAIB (type AB blood), and i (type O blood).

In the 1950s, a young woman sued film star Charlie Chaplin for parental support of her child. Charlie Chaplin was documented as having Type AB blood. The mother had type A blood, and her son had type O blood.

Use the "edit background" feature to show the possible crosses of Charlie and the mother.

The judge ruled in favor of the mother, and Charlie Chaplin had to pay child support for 18 years. Was the judge correct in his decision based on blood typing evidence? Use your Punnett squares from the previous question to support your answer.

If two heterozygous agouti mice are crossed, what percentage of offspring will NOT survive?

What is the phenotypic ratio of the surviving mice from the cross above?

If a homozygous black mouse is crossed with a heterozygous agouti mouse, what percentage of offspring will be heterozygous?

In plants known as "four o' clocks", the allele for the dominant red flower color is Incompletely Dominant over the allele for white flowers. A gardener chooses to cross a heterozygous pink-flowered plant with another heterozygous pink-flowered plant.

In a species of birds, blue feathers (B) are incompletely dominant to the gene for white feathers (W). Individuals that are heterozygous (BW) have blue-tipped feathers.A bird with blue-tipped feathers is crossed with a white bird. What is the chance that the offspring will have blue feathers?

The following cross is made between two pea plants:TTYy x TtyyWhat percentage of the offspring will be TTYy?

TTYy x Ttyy

Body color for horses is determined by two Incompletely dominant alleles: brown (BB) and cream (BC). When a horse is heterozygous for body color, it is described as palomino (BBBC).What is the expected phenotypic ratio if two palomino horses mate?

In humans, there are four types of blood: Type A, Type B, Type AB, and Type O. The alleles A (IA) and B (IB) are codominant to each other, and the O allele ( i ) is recessive to both A and B. This means a person with Type A blood could be IAIA or IAi.

Select all genotypes that represent Type B blood.

Select all genotypes that represent Type O blood.

Which genotype represents type AB blood?

In humans, the alleles for blood type are designated IA (type A blood), IB (type B blood), IAIB (type AB blood), and i (type O blood).

In the 1950s, a young woman sued film star Charlie Chaplin for parental support of her child. Charlie Chaplin was documented as having Type AB blood. The mother had type A blood, and her son had type O blood.

Use the "edit background" feature to show the possible crosses of Charlie and the mother.

The judge ruled in favor of the mother, and Charlie Chaplin had to pay child support for 18 years. Was the judge correct in his decision based on blood typing evidence? Use your Punnett squares from the previous question to support your answer.

If two heterozygous agouti mice are crossed, what percentage of offspring will NOT survive?

What is the phenotypic ratio of the surviving mice from the cross above?

If a homozygous black mouse is crossed with a heterozygous agouti mouse, what percentage of offspring will be heterozygous?

Select all genotypes that represent Type O blood.

Which genotype represents type AB blood?

In a species of birds, blue feathers (B) are incompletely dominant to the gene for white feathers (W). Individuals that are heterozygous (BW) have blue-tipped feathers.
A bird with blue-tipped feathers is crossed with a white bird. What is the chance that the offspring will have blue feathers?

The following cross is made between two pea plants:
TTYy x Ttyy
What percentage of the offspring will be TTYy?

Body color for horses is determined by two Incompletely dominant alleles: brown (B^B) and cream (B^C). When a horse is heterozygous for body color, it is described as palomino (B^BB^C).
What is the expected phenotypic ratio if two palomino horses mate?

In humans, there are four types of blood: Type A, Type B, Type AB, and Type O. The alleles A (I^A) and B (I^B) are codominant to each other, and the O allele ( i ) is recessive to both A and B. This means a person with Type A blood could be I^AI^A or I^Ai.

In humans, the alleles for blood type are designated I^A (type A blood), I^B (type B blood), I^AI^B (type AB blood), and i (type O blood).

In a species of birds, blue feathers (B) are incompletely dominant to the gene for white feathers (W). Individuals that are heterozygous (BW) have blue-tipped feathers.
A bird with blue-tipped feathers is crossed with a white bird. What is the chance that the offspring will have blue feathers?

The following cross is made between two pea plants:
TTYy x Ttyy
What percentage of the offspring will be TTYy?

Body color for horses is determined by two Incompletely dominant alleles: brown (B^B) and cream (B^C). When a horse is heterozygous for body color, it is described as palomino (B^BB^C).
What is the expected phenotypic ratio if two palomino horses mate?

In humans, there are four types of blood: Type A, Type B, Type AB, and Type O. The alleles A (I^A) and B (I^B) are codominant to each other, and the O allele ( i ) is recessive to both A and B. This means a person with Type A blood could be I^AI^A or I^Ai.

In humans, the alleles for blood type are designated I^A (type A blood), I^B (type B blood), I^AI^B (type AB blood), and i (type O blood).