Question

A cross between AaBB*aaBB yields a genotypic ratio

Answer 1

Heya..!

refer to the image attached

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Answer 2

Hello Dear,

# Given question has these options -

(1) 1 AaBB : 1 aaBB

(2) 1 AaBB : 3 aaBB

(3) 3 Aa BB : 1 aa BB

(4) All AaBb

◆ Answer -

(1) 1 AaBB : 1 aaBB

● Explanation -

For a cross between AaBB and aaBB,

• P1 generation = AaBB × aaBB
• Gametes formed = AB, aB × aB, aB
• F1 generation = AaBB, aaBB, AaBB, aaBB
• Genotypic ratio = 1 AaBB : 1 aaBB

Hence, cross between AaBB and aaBB yields gentotypic ratio 1 AaBB : 1 aaBB.

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