Severe combined immunodeficiency (scid): a. is a result of the absence of macrophages or b cells b. affects only part of the adaptive immune response. c. can be caused by failure of tap transporters. d. can be caused by failure of vdj recombination. e. all of the above.

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