The Sex of Birds,some Insects,and Other Organisms Is Determined by a ZW

question 5

Multiple Choice

The sex of birds,some insects,and other organisms is determined by a ZW chromosomal arrangement in which the males have like sex chromosomes (ZZ) and females are ZW (similar to XY in humans) .Assume that a recessive lethal allele on the Z chromosome causes death of an embryo in birds.What sex ratio would result in the offspring if a cross were made between a male heterozygous for the lethal allele and a normal female?

• A) 4:1 male to female
• B) 2:1 male to female
• C) 3:1 male to female
• D) 1:2 male to female
• E) 1:1 male to female

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Definitions:

Cerebellum

A part of the brain located at the back of the skull, primarily responsible for coordinating and regulating muscular activity.

Hippocampus

A region of the brain that is associated with memory formation and spatial navigation.

Retrieval Cues

Stimuli or prompts that facilitate the recall of information stored in memory.

Explicit Memory

Memory in which there is conscious awareness of remembering information.