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Punnett Squares

13. Mendelian Genetics / Punnett Squares / Problem 1

In Drosophila, brown body colour (B) is dominant to black (b) and long wings (W) are dominant to short wings (w). A researcher crossed a male Drosophila with genotype "BBWW" with a female Drosophila with genotype "bbww". She then crosses two Drosophila of the F₁ generation and draws the F₂ Punnett square in her record book, which is shown below, and you have to fill in the blanks in her Punnett square.

A

[1] - bbww; [2] - BBww; [3] - bbWW; [4] - BBWW

B

[1] - BBWW; [2] - BBww; [3] - bbWW; [4] - bbww

C

[1] - BBWW; [2] - bbWW; [3] - BBww; [4] - bbww

D

[1] - BBWW; [2] - bbww; [3] - BBww; [4] - bbWW

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