Question

Some people have one sickle cell gene and one normal gene. They have few defective cells and no symptoms because the sickle cell gene is recessive. How does the human system of reproduction result in people getting one copy of a sickle cell gene and one copy of a normal gene? Describe the process.

a) Meiosis leads to gene mutations.
b) Genetic mutations result in one sickle cell gene.
c) Dominant genes lead to the expression of the sickle cell gene.
d) A combination of genes from each parent results in offspring having one sickle cell and one normal gene.

Answer 1

The human system of reproduction results in people getting one copy of a sickle cell gene and one copy of a normal gene through a combination of genes from each parent. Hence the correct answer is option D

Step-by-step explanation:

The human system of reproduction results in people getting one copy of a sickle cell gene and one copy of a normal gene through a combination of genes from each parent. This is determined by the process of meiosis and the inheritance of genes from each parent. During meiosis, the parent cells undergo two rounds of division, resulting in four daughter cells. These daughter cells contain a random assortment of the parent's genes, including one copy of the sickle cell gene and one copy of the normal gene.

Hence the correct answer is option D