Genetics ...Q 1 - psychmledr

[ArchivalUser]

In autosomal dominant and sex-linked diseases that are genetic lethals (inidividuals die before they can reproduce), the source of the disease gene in the population is which one of the following?

A. Carriers of the disease gene
B. Male carriers of the disease gene
C. Female carriers of the disease gene
D. New mutations

[ArchivalUser]

DDDDDDDDDDD
A B and C no carriers in dominant diseases

[ArchivalUser]

DDDDD!

[ArchivalUser]

Can You Please Explain?

[ArchivalUser]

D. New mutations

[ArchivalUser]

Answer is D.

In genetic lethals, the disease gene cannot be passed on, so the presence of the gene in the population is entirely due to new mutations that recreate the disease gene.

[ArchivalUser]

Thanks for the explanation.