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Laabri

Unit 5 Exam: Inheritance of Traits v1

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The next set of questions is about Mendelian traits.

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In certain breeds of dogs, the gene for fur color has two alleles. The dominant allele (G) codes for grey fur and the recessive allele (g) codes for brown fur. A heterozygous grey male is crossed with a brown female. Respond to the following questions about that cross.

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Blue eyes are dominant to red eyes in rabbits. A heterozygous blue-eyed male rabit is crossed with a red-eyed female rabbit. Respond to the following questions about that cross.

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The next set of questions is about Non-Mendelian traits.

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1.

An egg cell is an example of which type of cell?

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2.

A sperm cell is an example of which type of cell?

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3.

Which of these is produced after an egg is fertilized by a sperm cell?

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4.

This type of cell has one set of chromosomes and a ploidy of 1n:

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5.

This type of cell has two sets of chromosomes and a ploidy of 2n:

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6.

This process happens ONLY in sex cells and is responsible for genetic variation:

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7.

How many chromosomes does a human zygote contain?

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8.

If a fruit fly zygote has 8 chromosomes, how many chromosomes are in a haploid fruit fly cell?

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9.

If a haploid chupacabra cell has 50 chromosomes, how many chromosomes will a diploid chupacabra cell have?

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10.

A homozygous white wolf is crossed with a heterozygous black wolf. Which allele is dominant for fur color?

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11.

Complete the Punnett square showing the cross between the dogs.

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12.

Show the genotypic ratios by dragging the correct number to each possible genotype.

  • 4

  • 3

  • 2

  • 1

  • 0

  • GG

  • Gg

  • gg

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13.

Show the phenotypic ratios by dragging the correct number to each possible phenotype.

  • 4

  • 3

  • 2

  • 1

  • 0

  • gray

  • brown

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14.

Complete the Punnett square showing the cross between the rabbits.

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15.

Show the phenotypic ratios by dragging the correct number to each possible phenotype.

  • 4

  • 3

  • 2

  • 1

  • 0

  • blue eyes

  • red eyes

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16.

Show the genotypic ratios by dragging the correct number to each possible genotype.

  • 4

  • 3

  • 2

  • 1

  • 0

  • BB

  • Bb

  • bb

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17.

In a certain breed of rabbits, crossing a black rabbit with a white rabbit will produce gray offspring. This is an example of:

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18.

In a certain species of plants, crossing a plant with red flowers and a plant with white flowers will produce a offspring with white patches and red patches on their flowers. This is an example of:

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19.

A colorblind male and a female who is a carrier for colorblindness have a child. The child has a 50% chance of being colorblind. The allele for colorblindness is recessive. This is an example of:

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20.

Snapdragon plants are incompletely dominant for color. They have the phenotypes red, white, and pink. The red and white flowers are homozygous, while the pink flowers are heterozygous. Complete a Punnett square showing a cross between a plant with red flowers and a plant with white flowers..

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21.

Use the Punnett square from #5 to place the predicted percentages for each offspring phenotype.

  • 100%

  • 75%

  • 50%

  • 25%

  • 0%

  • Red

  • White

  • Pink

  • Red & White patches

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22.

In some chickens, the gene for feather color is controlled by codominance. There are two alleles: black (B) and white (W). For an individual to be black or white , they must be homozygous (BB or WW) for that allele. An individual that inherits one of each allele will be speckled. Complete a Punnett square showing a cross between a black chicken and a speckled chicken.

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23.

Use the Punnett square from #7 to place the predicted percentages for each offspring phenotype.

  • 100%

  • 75%

  • 50%

  • 25%

  • 0%

  • Black

  • White

  • Gray

  • Black & White speckles

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24.

Human blood typing is an example of a trait with multiple alleles. It is also an example of codominance. There are two dominant alleles (A & B) and one recessive allele (O). If an individual is heterozygous with an A and B allele, both will be expressed.

Complete a Punnett square showing a cross between a Type AB father and a Type O mother.

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25.

Use the Punnett square from #9 to place the predicted percentages for each possible offspring phenotype.

  • 100%

  • 75%

  • 50%

  • 25%

  • 0%

  • Type A

  • Type B

  • Type AB

  • Type O

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26.

Hemophelia is an example of an X chromsome-linked trait. The allele for normal blood clotting is dominant, while the allele for hemophelia is recessive.

Complete a Punnett square showing a cross between female who is a carrier for hemophelia and a male who has hemophelia.

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27.

Use the Punnett square from #11 to place the predicted percentages for each possible offspring phenotype.

  • 100%

  • 75%

  • 50%

  • 25%

  • 0%

  • Female with normal blood clotting

  • Female with hemophelia

  • Male with normal blood clotting

  • Male with hemophelia

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28.

The pedigree below tracks the appearance of a recessive trait:

Match each individual on the left with the correct genotype on the right.

  • Dad

  • Mom

  • Sister

  • Brother 1

  • Definitely homozygous dominant

  • Definitely heterozygous

  • Definitely homozygous recessive

  • Could be homozygous dominant or heterozygous

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29.

The pedigree below tracks the appearance of a recessive trait:

Match each individual on the left with the correct genotype on the right.

  • I-2

  • II-2

  • II-3

  • III-6

  • Definitely homozygous dominant

  • Definitely heterozygous

  • Definitely homozygous recessive

  • Could be homozygous dominant or heterozygous

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30.

How is III-1 related to II-4?

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31.

Which of the following individuals are carriers? (Choose ALL that apply)

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32.

Select the correct definitions.

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33.

What are clues that a trait is recessive? (Choose ALL that apply)

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34.

How many children did I-1 and I-2 have?

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35.

This pedigree tracks hemophelia in a family. How many of III-3's sons have hemophelia?