Which mutation causes either the inclusion of an extra chromosome in offspring or the deletion of an entire chromosome?
a) deletion
b) insertion
c) crossing-over
d) non-disjunction

In the water cycle , when does water undergo a chemical change

In the respiration-photosynthesis cycle shown above, what are the products of cellular respiration that belong in box 2?

Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. an incomplete dominance cross is performed between a bird that is homozygous for red feathers and a bird that is homozygous for blue feathers. purple offspring result. then, two of the purple offspring are crossed. according to the punnett square for this cross, how many of the offspring from the second cross will have a feather color that results from incomplete dominance? 1 in 4 2 in 4 3 in 4 4 in 4