10 AP Bio Mendelian Genetics

A wide range of phenotypic variations occur in the trait for human height.  Which of the following accounts for these variations?

• Polygenic Inheritance
• Codominance
• Incomplete dominance
• Multiple Alleles

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NGSS.HS-LS3-3

Many plant species are capable of producing offspring through self-pollination. In self-pollination, gametes formed by meiosis and are used to fertilize egg cells from the same plant. Which of the following statements describes why offspring produced through self-pollination can exhibit genetic diversity?

• The genes found in each gamete will be genetically identical to one another.
• The self-pollination gametes are produced through meiosis and have undergone DNA replication.
• The gametes went through meiosis so they are different from each other even though the come from the same plant.

• Gametes involved in self-pollination only travel a short distance prior to becoming involved in fertilization.

Tags

NGSS.HS-LS3-2

Suppose that in sheep, a dominant allele (B) produce black hair and a recessive allele (b) produce white hair. If you saw a black sheep, you would be able to identify

• its phenotype for hair color

• its genotype for hair color

• the genotype of only one of its parents

• the phenotype of both of its parents

Gene assort independently from each other allowing a plant with the genotype of TtPp to produce gametes of TP, Tp, tP, tp. What is the best explanation for this? 

• The genes are on the same chromosome

• Some of the genes are dominant and some are recessive

• The genes for height and color are on different chromosomes

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NGSS.HS-LS3-2

If 2n = 48 for a particular cell, then the chromosome number in each cell after meiosis would be

• 96

• 48

• 24

• 12

What is the percentage of homozygous recessive offspring?

• 0%
• 25%
• 50%
• 75%

Imagine you are performing a cross involving seed color in garden pea plants. What F₁ offspring would you expect if you cross true-breeding parents with green seeds and true-breeding parents with yellow seeds? Yellow seed color is dominant to green.

• 100 percent yellow-green seeds
• 100 percent yellow seeds
• 50 percent yellow, 50 percent green seeds
• 25 percent green, 75 percent yellow seeds

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NGSS.HS-LS3-2

NGSS.HS-LS3-1

If you flip five coins, what is the probability of getting five heads? Apply the multiplication rule of probability.

• 1/16

• 1/32

• 1/64

• 1/8

Cystic fibrosis is a recessive genetic disorder. People with CF have a phenotype in which they produce excessive mucus in their lungs. If two parents who are heterozygous have four offspring, what is the probability that none of the offspring with have CF?

• 32%

• 0.4%

• 4%

• 75%

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Cystic fibrosis is a recessive genetic disorder. People with CF have a phenotype in which they produce excessive mucus in their lungs. If two parents who are heterozygous plan to have a child, what is the probability that the child will be born with have CF?

• 25%

• 0.4%

• 4%

• 75%

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-1

NGSS.HS-LS3-3