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Question 53

How is each box inside a Punnett square filled in?

  1. By combining its row allele with its column alleleCorrect answer
  2. By copying the genotype of the nearer parent straight into it
  3. By writing the phenotype the offspring will show
  4. By adding up the alleles in all four boxes

Explanation

Every box stands for one fertilisation, joining a gamete from the top of the square with a gamete from the side, so it takes one allele from each direction. Copying a parent genotype into a box skips the fertilisation the square exists to model and would make every offspring a copy of a parent.

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Question 53: How is each box inside a Punnett square filled in? · Genetics Basics · Questena