A Geneticist Is Mapping the Chromosomes of the Newly Captured

question 52

Multiple Choice

A geneticist is mapping the chromosomes of the newly captured gremlin. Stripe is heterozygous for linked genes with alleles Bb, Ee, and Hh that determine if gremlins have biting teeth (B) , are evil (E) , have hair (H) . In order to determine if the three genes are linked, a standard testcross was done, and 1000 offspring had the following genotypes: $$\begin{array} { l l } 48 & \text { bb ee } \mathrm { Hh } \\36 & \text { Bb ee hh } \\400 & \text { Bb ee } \mathrm { Hh } \\4 & \text { Bb Ee Hh } \\426 & \text { bb Ee hh } \\46 & \text { Bb Ee hh } \\38 & \text { bb Ee Hh } \\2 & \text { bb ee hh }\end{array}$$ What is the recombination frequency between genes E and B?

• A) 9.0%
• B) 8.4%
• C) 42.6%
• D) 10.0%
• E) 9.4%

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Definitions:

Food Deprivation

The condition of having insufficient food to meet basic nutritional needs, leading to hunger or starvation.

Salivary Glands

Glands that furnish moisture that helps in tasting and digesting food.

Moisture

The presence of a liquid, usually water, often in trace amounts, within a substance, material, or environment.

Ghrelin

A hormone produced mainly by the stomach that stimulates appetite and promotes fat storage.