Edward was found to be heterozygous (Ss) for sickle-cell trait, the alleles represented by the letter S and s?

Question

Edward was found to be heterozygous (Ss) for sickle-cell trait, the alleles represented by the letter S and s are

a. on the X and Y chromosomes

b. linked

c. on homologous chromosomes

d. on the same chromosome but far apart

Answer 1

C) on homologous chromosomes. S & s are different forms of the same gene  = alleles.

Answer 2

C. On homologous chromosomes.

Homologous chromosomes are pairs of chromosomes that have genes for same traits. Each person inherits one copy of his/her chromosomes from each parent. If a person is heterozygous for a trait (Ss) he/she must have inherited on of the chromosomes from one parent (the one with S) and the other one from the other parent (the one with s).

Answer 3

c