Judge the inheritance claims

Exercise and reference answers

Questions

1. Reason

   Both alleles express themselves fully rather than blending.

   Verdict

   Both are true; the reason explains the assertion.

   Assertion

   In co-dominance the F1 resembles both parents.

2. Reason

   A dihybrid cross follows two characters at once.

   Verdict

   The assertion is false and the reason is true.

   Assertion

   A monohybrid F2 gives a 9:3:3:1 ratio.

3. Reason

   The individual is crossed with the recessive parent.

   Verdict

   Both are true; the reason explains the assertion.

   Assertion

   A test cross reveals an unknown genotype.

4. Reason

   Colour blindness affects the red or green cone of the eye.

   Verdict

   The assertion is false and the reason is true.

   Assertion

   Colour blindness is an autosomal dominant disorder.

Instructions

Read A and R, then tap the verdict that fits both.

Explanation