Heredity influenced by sex (problems solved). (Page 22)
As we have seen when we talk about inheritance influenced by sex, these are characters determined by genes that are not on the sex chromosomes, but whose manifestation depends on the sex of the individual. It is not linked to sex, but it is influenced by sex .
If a character has a different type of inheritance depending on whether it is men or women, there are alleles that behave as dominant in men and recessive in women, or vice versa.
To resolve this type of inheritance, sex must be considered as one character, and act as if it were the inheritance of two characters (as in Mendel's third law).
The most typical case is that of baldness in humans. The allele that determines baldness is dominant in men but recessive in women. Thus, the heterozygous genotype in men will lead to a bald person, while in women it will lead to a non-bald person.
CC genotype: bald men and bald women.
Genotype Cc: bald men, women with hair.
Genotype cc: men and women with hair.