Both Parents Have One Copy of a Dominant Allele for Gene

question 66

Multiple Choice

Both parents have one copy of a dominant allele for gene 87 and one recessive allele for Gene 87.What is the chance that their children will inherit the recessive condition (two copies of Gene 87) ? You may need to draw a Punnett square to figure this out.

• A) 0%
• B) 25%
• C) 50%
• D) 75%
• E) 100%

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Definitions:

Chromosome

A thread-like structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes.

Nucleus

The membrane-bound organelle in eukaryotic cells that contains genetic material (DNA).

Second Meiotic Division

The second phase of meiosis where sister chromatids are separated, resulting in the formation of four haploid daughter cells from the initial diploid cell.

Haploid

A cell or organism having a single set of chromosomes, characteristic of gametes such as sperm and egg cells in sexually reproducing organisms.