A. Consider the gene A, which has two alleles, A and a. List all possible monohy

Question

A. Consider the gene A, which has two alleles, A and a. List all possible monohybrid crosses for this pair of alleles (including boring ones like AA x AA), and diagram the Punnet square for each cross. B.In progeny of the cross Aa Bb Cc x aa Bb cc, how many will be A_ B_ C_? How many different types of gametes can be produced by each parent? C.In fruit flies (Drosophila melanogaster), the bn+ allele for normal dull red eyes is dominant to the bn allele that gives brown eyes. Another gene affects wing shape; for this gene, the ct+ allele for normal wings is dominant to the ct allele, which gives

Explanation / Answer

A. Consider the gene A, which has two alleles, A and a.

List all possible monohybrid crosses for this pair of alleles (including boring ones like AA x AA),

and diagram the Punnet square for each cross.

AA x AA

A

A

A

AA

AA

A

AA

AA

B.In progeny of the cross Aa Bb Cc x aa Bb cc, how many will be A_ B_ C_?

Aa x aa

1/2 X 1

Bb x Bb

1/2 X 1

Cc x cc,

1/2 X 1

how many will be A_ B_ C_?

2^N= 2^3

2^1= 2^1

ANSWER = 16/8=2

How many different types of gametes can be produced by each parent?

2^N= 2^3-=8--TYPES OF GAMETES-------Aa Bb Cc

2^1= 2^1=2------TYPES OF GAMETES---aa Bb cc

A

A

A

AA

AA

A

AA

AA

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