In Fruit Flies,bar Eye Is Inherited by an X-Linked Allele

question 51

Multiple Choice

In fruit flies,bar eye is inherited by an X-linked allele (B for bar) .If a heterozygous bar-eyed female is mated to a non-bar-eyed male,what will be the expected ratio of phenotype given four offspring?

• A)two bar-eyed females,two bar-eyed males
• B)one bar-eyed and one non-bar-eyed female,one bar-eyed and one non-bar-eyed male
• C)three bar-eyed females and one non-bar-eyed male
• D)bar-eyed females only
• E)non-bar-eyed males only

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Definitions:

Hypothetically

Refers to a situation or statement based on or involving a hypothesis or supposition rather than hard facts.

Formal Operational Stage

The fourth stage in Jean Piaget’s theory of cognitive development, typically beginning around age 11, marked by the ability to think abstractly and reason logically.

Concrete Operational

A stage in Piaget's theory of cognitive development where children ages 7-12 develop logical thinking but still struggle with abstract concepts.

Moral Reasoning

The process of determining right from wrong in a logical, systematic way, often based on ethical principles.