The Phenotype of Vestigial Short)wings Vg in Drosophila Melanogaster Is

question 41

Multiple Choice

The phenotype of vestigial short) wings vg in Drosophila melanogaster is caused by a recessive mutant gene that independently assorts with a recessive gene for hairy h) body.Assume that a cross is made between a fly with normal wings and a hairy body and a fly with vestigial wings and normal body hair.The wild- type F1 flies were crossed among each other to produce 1024 offspring.Which phenotypes would you expect among the 1024 offspring,and how many of each phenotype would you expect?

• A)Phenotypes: wild,vestigial,hairy,and vestigial hairy; Numbers expected: wild 576 ,vestigial 192),hairy 192),and vestigial hairy 64 .
• B)Phenotypes: wild,vestigial,hairy,and vestigial hairy; Numbers expected: wild 256 ,vestigial 256),hairy 256),and vestigial hairy 256 .
• C)Phenotypes: wild,vestigial,hairy,and vestigial hairy; Numbers expected: wild 192 ,vestigial 256),hairy 64),and vestigial hairy 192 .
• D)All vestigial hairy.
• E)All wild type.

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Definitions:

Varicose Veins

Enlarged, swollen, and twisting veins, often appearing blue or dark purple, resulting from faulty valves in the veins.

Damaged Valves

Defective heart valves that fail to open or close properly, affecting the blood flow through the heart and potentially leading to heart disease.

Slow Blood Movement

The reduced rate of blood flow through vessels, which can affect oxygen and nutrient delivery to tissues.

Blood Volume Reservoirs

Sites in the body that can hold large volumes of blood and can be mobilized in case of need, such as during hemorrhage or dehydration.