Consider the case of dominant epistasis in squash, where yy and yy = yellow and yy = green. at a second, independently assorting locus, ww and ww = white, and ww allows for yellow or green. what is the expected phenotypic ratio among the progeny of the cross yyww × yyww? (note these are white squash.)

Option D, 12:3:1

Explanation:

Please see the attachment

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.