In humans, the gene for dark hair color dominates over the gene for light color. A dark-haired woman whose

In humans, the gene for dark hair color dominates over the gene for light color. A dark-haired woman whose father was blonde. Married a blonde man. What are the possible genotypes and feng types of offspring?

Let’s designate the gene that leads to the development of dark hair as C, and the gene for light hair as c.

The woman’s blonde father had a homozygous genotype – cc, because blonde hair can only develop in the absence of the dominant dark hair genes. He produced the same type of sperm and could pass only the gene for blond hair to the offspring.

Therefore, the dark-haired woman is heterozygous – Cc. It produces eggs with and C.

The blond man she is marrying, like her father, is homozygous for the gene for blond hair – cc. The spermatozoa produced by it are of the same type – p.

The offspring of this family will include options:

dark-haired children – heterozygotes (Cc) – 50%;

fair-haired children – homozygotes (cc) – 50%.