Unit 3: Reproduction and Heredity Quiz

Which of the following is true for organisms that have two identical alleles for a particular trait?

• They are hybrids.

• They are homozygous.

• They are heterozygous.'

• They are codominance.

The diagram to the left is a Punnett square for the cross between heterozygous flowers. Rr and Rr. Assuming the flowers in the cross display complete dominance, and the allele, R is dominant for a red pigment and the allele r, is recessive for a white pigment, what percent of the offspring will have red flowers?

• 25%

• 75%

• 100%

• 50%

What are the stages of Meiosis? Write your own answers using complete sentences and details as it pertains to the content of the standard.

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Which questions does the process of selective breeding help to resolve?

• How can two organisms be prevented from producing offspring?

• How can the most desired traits in offspring be achieved?

• How can mutations that are passed onto offspring be avoided?

• How can breeding be sped up to increase the number of offspring?

How are asexual and sexual reproduction similar?

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The table to the left displays types of reproduction exhibited by different organisms. Which row best describes asexual reproduction?

• Row Z

• Row X

• Row W

• Row Y

Why do children sometimes look very similar to their parents?

• Children look like the parent that they spend the most time with.

• Children and parents are quite often raised in the same environment.

• Children inherit a combination of genes from both parents.

• Children only inherit genes from the parent of the same gene.

What is DNA? Write your answer using complete sentences and details as it pertains to the content of the standard.

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What are the stages of the cell cycle?

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How many chromosomes are found in the human body cells?

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