The diagram to the right represents a pair of homologous chromosomes in a diploid cell, and the resulting chromosome in a haploid cell. The letters represent alleles of genes. Why does the chromosome in the haploid cell have alleles from both of the
chromosomes in the diploid cell?
Homologous
Chromosomes Chromosome
in Diploid Cell in Haploid Cell
A
a
B
b
b
С
c
D
d
E
E
O Incomplete dominance occurred during gene
O Independent assortment occurred during fertilization.
Crossing over occurred during meiosis
A mutation occurred during a viral infection