a.
To explain:
The proportions of progeny produced and
Introduction:
Notch mutations in Drosophila are X-linked wing mutations. One of the reasons for these mutations is chromosome deletion. Notch deletions are dominant mutations. The heterozygous flies for Notch mutations have notched wings along the edges and at the tips. This mutation is lethal in homozygous and hemizygous condition.
a.
Explanation of Solution
Tabular representation:
Gametes | ||
Table.1: The progeny produced by mating of red-eyed Notch female and white-eyed male.
The locus for white eyes is covered with Notch mutations. The female is red-eyed and have Notch mutation, so her genotype would be
The progeny produced by mating of red-eyed Notch female and white-eyed male can be seen in Table.1: “The progeny produced by mating of red-eyed Notch female and white-eyed male”.
b.
To explain:
The proportions of progeny produced and phenotypes produced by mating betweenwhite-eyed Notch female with red-eyed male.
Introduction:
Notch mutations in Drosophila are X-linked wing mutations. One of the reasons for these mutations is chromosome deletion. Notch deletions are dominant mutations. The heterozygous flies for Notch mutations have notched wings along the edges and at the tips. This mutation is lethal in homozygous and hemizygous condition.
b.
Explanation of Solution
Tabular representation:
Table.2: The progeny produced by mating of white-eyed Notch female and red-eyed male.
Gametes | ||
Table.2: The progeny produced by mating of white-eyed Notch female and red-eyed male.
The female is white-eyed and has Notch mutation, so her genotype would be
The progeny produced by mating of white-eyed Notch female and red-eyed male can be seen in Table.2: “The progeny produced by mating of white-eyed Notch female and red-eyed male”.
c.
To explain:
The proportions of progeny produced and phenotypes produced by mating betweenwhite-eyed Notch female with white-eyed male.
Introduction:
Notch mutations in Drosophila are X-linked wing mutations. One of the reasons for these mutations is chromosome deletion. Notch deletions are dominant mutations. The heterozygous flies for Notch mutations have notched wings along the edges and at the tips. This mutation is lethal in homozygous and hemizygous condition.
c.
Explanation of Solution
Tabular representation:
Table.3: The progeny produced by mating of white-eyed Notch female and white-eyed male.
Gametes | ||
Table.3: The progeny produced by mating of white-eyed Notch female and white-eyed male.
The female is white-eyed and have Notch mutation, so her genotype would be
The progeny produced by mating of white-eyed Notch female and white-eyed male can be seen in Table.3: “The progeny produced by mating of white-eyed Notch female and white-eyed male”.
Notch mutation is lethal in hemizygous and homozygous condition. So males can never have Notch mutation. The proportion of phenotypes produced by mating of red-eyed Notch female with white-eyed male will be
The proportion of phenotypes produced by mating of white-eyed Notch female with red-eyed male will be
The proportion of phenotypes produced by mating of white-eyedNotch female with white-eyed male will be
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Chapter 8 Solutions
Genetics: A Conceptual Approach
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