Which Types of Phenotypic Ratios Are Likely to Occur in Crosses

question 50

Multiple Choice

Which types of phenotypic ratios are likely to occur in crosses when dealing with a single gene pair for which all the genotypic combinations are of equal viability?

• A) 9:3:3:1, 27:9:9:9:3:3:3:1
• B) 12:3:1, 9:7
• C) 1:2:1, 3:1
• D) 2:3, 1:2
• E) 1:4:6:4:1, 1:1:1:1

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Definitions:

Gastrocnemius

A major calf muscle that is involved in walking, running, and jumping, contributing to the movement of the ankle and knee.

Extensor Digitorum Longus

A muscle in the leg that helps to extend the toes and dorsiflex the foot, playing a key role in walking.

Lateral Toes

The toes located on the outer sides of the feet, important for balance and supporting walking gait.

Tibialis Anterior

A muscle in the lower leg that dorsiflexes and inverts the foot, playing a key role in walking and balance.