The Punnett square shows the possible genotype combinations of two parents who are homozygous for a trait. What is the probability of the parents having a child that is heterozygous for this trait?

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction. this is an example of speciation.

Mutations associated with albinism affect proteins involved in synthesis

Which of the following is a testable hypotheses?