{{asɛmtiNe Ɔkyerɛwfo}} | Nhomakorabea | Nneɛma a ɛma wotumi yɛ ade

Ɛhia

1

In guinea pigs, black coat color (B) is dominant over white coat color (b) and short hair (S) is dominant over long hair (s). Based upon the dihybrid cross shown below, what is the genotype and phenotype for the offspring represented by the letter X?

BBss; black coat, long hair

Bbss; brown coat, long hair

BbSs; black coat, short hair

Bbss; black coat, long hair

Ɛhia

1

Rasheed crossed plants that were heterozygous—have two different alleles—for the traits of flower color, seed color, and seed shape as part of an investigation designed to verify the results of Gregor Mendel’s experiments. The table above displays the results.
Based on the information in the table, which of the following is a valid conclusion?

White flowers are dominant.

Wrinkled seeds are a recessive trait.

Yellow seeds are a recessive trait.

Flower color is the result of environmental conditions.

1

Match the definitions correctly below.

Draggable item		Corresponding Item
complete dominance		when a dominant allele does not completely mask the effects of a recessive allele; so the two dominant traits blend together
incomplete dominance		phenomenon in which two alleles are expressed to an equal degree within an organism (both traits are visible)
codominance		a form of dominance in the heterozygous condition wherein if there is a dominant allele then it complete masks the recessive allele

1

Match the pictures correctly below.

Draggable item		Corresponding Item
complete dominance
incomplete dominance
codominance

1

What is a possible genotype for Mrs. Beck's brown hair?

H^BdH^Bd

H^BrH^Bd

h^Rh^R

h^bkh^bk

In cattle, red hair (RR) and white hair (WW) are codominant. Cows with both alleles (RW) have a roan coat, which shows both red and white hairs.

Ɛhia

1

What are the possible genotypes and phenotypes if you cross a roan cow (RW) with a red cow (RR)?

50% WW (white), 50% RW (roan)

100% RW (roan)

50% RW (roan), 50% RR (red)

100% RR (red)

Ɛhia

1

In chickens, black feathers (BB) and white feathers (WW) demonstrate incomplete dominance. Chickens with both alleles (BW) have grey feathers.

Ɛhia

1

What are the possible genotypes and phenotypes if you cross a grey chicken (BW) with a white chicken (WW)?

100% BW (grey)

25% BW (grey), 75% WW (white)

100% WW (white)

50% WW (white), 50% BW (grey)

Ɛhia

1

Colorblindness is a sex-linked trait carried on the X chromosome. The allele for normal vision is Xᴺ, and the allele for colorblindness is Xⁿ. Males are XY, and females are XX.

Ɛhia

1

What are the possible genotypes and phenotypes if a carrier mother (XᴺXⁿ) has children with a normal-vision father (XᴺY)?

50% XᴺXᴺ (normal female), 25% XᴺXⁿ (carrier female), 25% XⁿY (colorblind male)

25% XᴺXᴺ (normal female), 25% XᴺXⁿ (carrier female), 25% XᴺY (normal male), 25% XⁿY (colorblind male)

50% XᴺXⁿ (carrier female), 50% XᴺY (normal male)

100% XᴺXᴺ (normal female)

Ɛhia

1

5.5 Complex Mendelian Lesson

5.5 Complex Mendelian Lesson

In guinea pigs, black coat color (B) is dominant over white coat color (b) and short hair (S) is dominant over long hair (s). Based upon the dihybrid cross shown below, what is the genotype and phenotype for the offspring represented by the letter X?

Match the definitions correctly below.

Match the pictures correctly below.

What is a possible genotype for Mrs. Beck's brown hair?

What are the possible genotypes and phenotypes if you cross a roan cow (RW) with a red cow (RR)?

What are the possible genotypes and phenotypes if you cross a grey chicken (BW) with a white chicken (WW)?

What are the possible genotypes and phenotypes if a carrier mother (XᴺXⁿ) has children with a normal-vision father (XᴺY)?

In guinea pigs, black coat color (B) is dominant over white coat color (b) and short hair (S) is dominant over long hair (s). Based upon the dihybrid cross shown below, what is the genotype and phenotype for the offspring represented by the letter X?

Match the definitions correctly below.

Match the pictures correctly below.

What is a possible genotype for Mrs. Beck's brown hair?

What are the possible genotypes and phenotypes if you cross a roan cow (RW) with a red cow (RR)?

What percentage of the offspring would have a roan coat?

What are the possible genotypes and phenotypes if you cross a grey chicken (BW) with a white chicken (WW)?

What percentage of the offspring would have grey feathers?

What are the possible genotypes and phenotypes if a carrier mother (XᴺXⁿ) has children with a normal-vision father (XᴺY)?

What percentage of their sons would be colorblind?

What percentage of the offspring would have a roan coat?

What percentage of the offspring would have grey feathers?

What percentage of their sons would be colorblind?