Different Ratios Occur in Crosses with Single Gene Pairs or Two

question 37

Multiple Choice

Different ratios occur in crosses with single gene pairs or two gene pairs. What types of ratios are likely to occur in crosses dealing with a single gene pair?

• A) 3:1, 1:1, 1:2:1
• B) 9:7, 12:3:1
• C) 1:1:1:1, 1:4:6:4:1
• D) 9:3:3:1, 1:2:1
• E) 15:1, 1:2

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Definitions:

Parietal Lobes

Regions of the brain located behind the frontal lobes, important for processing sensory information and spatial orientation.

Endocrine Systems

The collection of glands that produce hormones to regulate metabolism, growth, development, and reproduction among other functions.

Epigenetics

The study of how behaviors and environment can cause changes that affect the way genes work, without altering the DNA sequence itself.

Genotype

The genetic makeup of an organism, consisting of all its genes and their variations.