Using What We`ve Learned

Human chromosomes carry genes that control a variety of traits.
Humans have 23pairs chromosomes. One of those pairs
determine the sex of a person.

Female inherited two X chromosomes, one from each parent.

Males inherited one X from one parent and one Y chromosomes from the other.
Only males have a Y chromosomes.

Inheritetance can be controlled by crossing plants or animals to produce offspring
with ceirtain deliberate trait. People have used selective breeding for centuries to produce
better crops, hardier domestic animals, and prettier flower.