What fraction of the time will the cross of Aa Bb with Aa Bb produce an offspring that is aa bb ?
A)16/16
B)9/16
C)6/16
D)3/16
E)1/16

Question

What fraction of the time will the cross of Aa Bb with Aa Bb produce an offspring that is aa bb ? ​
A)16/16
B)9/16
C)6/16
D)3/16
E)1/16

Quizplus · Accepted Answer

The cross of Aa Bb with Aa Bb can be analyzed by looking at each gene separately. For gene A, the chance of producing aa is 1/4 (since Aa x Aa gives AA, Aa, aa, Aa, with aa being one of the four possibilities). Similarly, for gene B, the chance of producing bb is also 1/4. Therefore, the combined probability of producing an offspring that is aa bb is 1/4 * 1/4 = 1/16.

What Fraction of the Time Will the Cross of Aa