Examlex
The ________ is the area of gray matter that surrounds the central canal.
Homozygous
A genetic condition where an individual has two identical alleles for a particular gene or trait.
Heterozygous
Having two different alleles of a particular gene, one inherited from each parent.
Sex Chromosomes
Chromosomes involved in determining the sex of an organism, with human males typically having one X and one Y chromosome, and females having two X chromosomes.
X Chromosome
One of the two sex chromosomes, which plays a crucial role in determining genetic sex and can carry genes affecting various traits and conditions.