PATHOLOGY

Detailed explanation-1: -In squash plants, yellow fruit (Y) is dominant to white fruit (y). If two plants heterozygous for yellow fruit are crossed, what are the possible genotypes of the offspring? Incorrect. For this to be possible, one parent would have to be homozygous dominant and the other would have to be homozygous recessive.

Detailed explanation-2: -The fruit color of the summer squash is expressed in this way. Homozygous recessive W gene expression (ww) combined with homozygous dominant or heterozygous Y gene expression (YY or Yy) produces yellow fruit, and green fruit is produced by the wwyy genotype.

Detailed explanation-3: -White fruit color in summer squash is influenced by a dominant allele W, whereas colored fruit must be vvw. In the presence of wvv, a dominant gene G results in yellow fruit, and homozygous gg results in green fruit.

Detailed explanation-4: -In summer squash, three types of fruit colours appear, white, yellow and green. White colour fruit is determined by dominant gene W and its recessive allele is w and yellow colour is controlled by another dominant gene G and its recessive allele is g.