which phrase best describes the process of crossing over ? A) pairs of sister chromatids become linked B) pairs of sister chromatids exchange segments C) pairs of homologous chromosomes become linked D) pairs of homologous chromosomes exchange segments

D

Explanation:

an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.