Question

Let’s brush up on mapping. For questions 1-8, pure-breeding P0 animals were mated to generate F1 animals heterozygous at the B and W genes. The heterozygous F1 animals were test-crossed and yielded progeny with the phenotypes below. Mutations in the B gene (b) cause a “no bristles” phenotype. Mutations in the W gene (w) cause a “no wings” phenotype. Both genes are haplosufficient. 45% normal bristles, normal wings 45% no bristles, no wings 5% no bristles, normal wings 5% normal bristles, no wings The numbers above suggest that the B and W genes are linked. What ratio of progeny would you have expected to see if B and W were on different chromosomes?

Answer 1

Answer:

When DNA is duplicated during mitosis, _____.

one completely new DNA molecule is formed

two completely new DNA molecules are formed

two molecules are formed, each with one original side

the original molecule thickens and separates into two

Explanation: