Which concept does the nurse use when explaining the inheritance of genetic disorders to a couple beginning to think about starting a family?
A) Humans have 46 pairs of chromosomes.
B) Egg and sperm cells each have 23 pairs of chromosomes.
C) Males have two X chromosomes.
D) A person inherits one chromosome from a chromosome pair from each parent.
D) A person inherits one chromosome from a chromosome pair from each parent.
Explanation: A) Humans have a total of 46 chromosomes in most cells of the body, which are grouped in 23 pairs. Think of them as 23 pairs of shoes, with a total of 46 shoes.
B) Humans have a total of 46 chromosomes in most cells of the body, which are grouped in 23 pairs. Think of them as 23 pairs of shoes, with a total of 46 shoes. For each pair of chromosomes, an individual inherits one chromosome from each parent.
C) The 23rd pair are the sex chromosomes and are designated either X or Y. Individuals with two X chromosomes are female, and those with an X chromosome and a Y chromosome are male.
D) Humans have a total of 46 chromosomes in most cells of the body, which are grouped in 23 pairs. Think of them as 23 pairs of shoes, with a total of 46 shoes. For each pair of chromosomes, an individual inherits one chromosome from each parent.
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