Question

Which of the following is not true about haplosufficient genes?

A) loss of function alleles of haplosufficient genes are usually recessive
B) most (but not all) genes in humans are haplosufficient
C) haplosufficient genes are always present in only one copy in humans
D) one wild type copy of a haplosufficient gene is sufficient for a wild type level of function
E) the white gene in Drosophila is an example of a haplosufficient gene

Answer 1

Haplosufficient genes can function normally with only one copy in an organism. While most haplosufficient genes are present in only one copy in humans, there are some genes that have multiple copies in the genome. So, the correct answer is option c.

Step-by-step explanation:

Haplosufficient genes are genes that can function normally with only one copy in an organism. The statement that is not true about haplosufficient genes is C) haplosufficient genes are always present in only one copy in humans. While most haplosufficient genes are present in only one copy in humans, there are some genes that have multiple copies in the genome. For example, the human alpha-globin gene cluster contains multiple copies of the gene that are necessary for normal blood cell function.

So, the correct answer is option c.