In a Dihybrid Cross AABB *Aabb, What Proportion of Heterozygotes

question 25

Multiple Choice

In a dihybrid cross AABB *aabb, what proportion of heterozygotes for both gene pairs is expected among the F₂ offspring?

• A)1/4
• B)1/2
• C)3/4
• D)All are heterozygotes.
• E)None are heterozygotes.

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Definitions:

Dementia

A category of brain diseases that cause a long-term and often gradual decrease in the ability to think and remember, significantly affecting daily functioning.

Alzheimer's disease

A progressive neurological disorder causing memory loss, cognitive decline, and personality changes, leading to severe impairment.

Frontotemporal dementia

A form of dementia characterized by progressive degeneration of the frontal and/or temporal lobes of the brain, affecting personality, behavior, and language.

Prodromal period

The phase early in the development of a disease, showing initial symptoms but not yet the full-blown clinical picture.