Meiosis and Genetics Summative

Your friend has attached earlobes like his maternal grandfather. His mother and father both have free earlobes, which are dominant. Which statement best explains how your friend inherited attached earlobes?

• He received a recessive allele from each parent

• He received a dominant allele from each parent

• He received a recessive allele from his mother and a dominant allele from his father

• He received a dominant allele from his mother and a recessive allele from his father

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ABO Blood types are an example

• incomplete dominance

• polygenic inheritance

• codominance

• completely dominant

• multiple alleles

If a homozygous red flower and a homozygous white flower end up with 100% pink offspring, what type of inheritance pattern would this be?

• incomplete dominance

• multiple alleles

• complete dominance

• codominance

In ABO blood typing, type O blood is recessive to A and B alleles, while A and B alleles are codominant to each other. Would it be possible for a child to be born with type O blood if their parents are both type A?

• No, two type A parents can only produce A offspring

• Yes, if both parents were heterozygous.

• No, because there are no carriers for the O blood type.

• Yes if both parents were homozygous

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Colorblindness is caused by an X-linked recessive allele. Which of the following is true?

• A colorblind male only receives the colorblind allele from his mother; the father does not matter

• A colorblind male only receives the colorblind allele from his father; the mother does not matter

• A colorblind female only receives the colorblind allele from her father; the mother does not matter

• A colorblind female only receives the colorblind allele from her mother; the father does not matter

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At a particular phase in the cell cycle, chromosomes have aligned near the middle of a cell. Which sequence of events will the cell need to complete to produce TWO IDENTICAL daughter cells?

• metaphase II > anaphase II > telophase II

• anaphase II > telophase II > cytokinesis

• anaphase > telophase > cytokinesis

• prophase > cytokinesis > anaphase

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Two pea plants have the genotypes TT and Tt where T is completely dominant to t. Which of the following statements is true?

• have the same phenotype.

• have all recessive alleles.

• have all dominant alleles

• have different phenotypes

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In a certain species of flower, purple is completely dominant to white flower color. If you cross a white flower and a homozygous purple flower, what fraction of the offspring will be heterozygous purple flowers?

• 1/4

• 3/4

• 2/4

• 4/4

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13. In seals, the gene for the length of the whiskers has two alleles. The dominant allele (W) codes long whiskers and the recessive allele (w) codes for short whiskers. If you breed two long-whiskered seals, one that is homozygous dominant and one that is heterozygous, what is the ratio of homozygous offspring to heterozygous offspring?

• 2:2

• 1:3

• 0%

• 1:4

Colorblindiness is a gene carried on the X chromosome. If a female has colorblindness, and had offspring with a colorblind male, what percentage of their sons will be colorblind?

• 75%

• 50%

• 100%

• 0%

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