In Fruit Flies, an X-Linked Dominant Mutation (N) Causes Notch

question 9

Multiple Choice

In fruit flies, an X-linked dominant mutation (N) causes Notch wings in heterozygous females but is lethal in hemizygous or homozygous condition.What ratio of offspring would be observed in a cross of a Notch female with a normal male?

• A)1/3 Notch females, 1/3 normal females, 1/3 normal males
• B)1/4 Notch females, 1/4 normal females, 1/4 Notch males, 1/4 normal males
• C)1/2 Notch females, 1/2 normal males
• D)1/2 normal females, 1/2 Notch males
• E)2/3 Notch females, 1/3 normal males

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Definitions:

Coefficient

A numerical or constant quantity placed before and multiplying the variable in an algebraic expression (e.g., 4 in 4x).

Expression

A combination of symbols and numbers that represents a mathematical computation or quantity.

Distributive Property

A property indicating that the multiplication of a number by a sum is equal to the sum of the individual multiplications, represented as \(a(b + c) = ab + ac\).

Additive Inverse Property

A principle stating that for any real number, there exists another real number that, when added together, equals zero.