A Dihybrid AaBb Female Drosophila Is Testcrossed with an Aabb $\quad$

question 14

Multiple Choice

A dihybrid AaBb female Drosophila is testcrossed with an aabb male.The following offspring genotypes were obtained.
AaBb $\quad$ 99
Aabb $\quad$ 83
AaBb $\quad$ 86
Aabb $\quad$ 92
A $\chi$ ² test was performed to determine whether the data supported the original hypothesis that the genes are unlinked.How many degrees of freedom should be used in this analysis?

• A)1
• B)2
• C)3
• D)4
• E)5

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Definitions:

Reflexes

Automatic and involuntary responses of the body to specific stimuli, designed to protect the body and maintain homeostasis.

Nipple

A small projection on the surface of the breast through which milk is delivered.

Cheek

The part of the face that is below the eye and to the side of the nose and mouth.

Adolescents

Young people in the transitional stage from childhood to adulthood, typically between the ages of 13 and 19.