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Question 69

Two heterozygous rabbits have already produced three offspring, and all three show the dominant characteristic. How does this affect the chance that the next offspring shows the recessive characteristic?

  1. It is unchanged, because each offspring gets its own independent pair of allelesCorrect answer
  2. It rises, because the recessive characteristic is now overdue
  3. It falls, because this pair evidently passes on the dominant allele
  4. It becomes impossible, because the earlier offspring used up the recessive outcomes

Explanation

Every offspring is formed from a fresh pair of gametes, and the gametes that made the earlier offspring are gone rather than taken out of a limited store. What has already happened leaves the alleles held by the parents exactly as they were, so the odds facing the next offspring are those that faced the first.

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Question 69: Two heterozygous rabbits have already produced three… · Genetics Basics · Questena