Question

Which event can directly produce one chromosome containing both maternal and paternal genes?

a. crossing-over and independent assortment
b. one chromosome can never have genes from both parents

c. independent assortment only
d. crossing-over only

Answer 1

One chromosome can have genes from both parents. So C is incorrect .

Crossing over is the process in which the maternal and paternal chromosomes come in contact with one another and then separate.So the chromosome will have components of both paternal and maternal chromosome.

Independent assortment means the two members of two pairs of allele segregate independently of one another.

So crossing over can directly produce a chromosome having both paternal and maternal genes.So answer is D.