A Diploid Somatic Cell from a Rat Has a Total

question 55

Multiple Choice

A diploid somatic cell from a rat has a total of 42 chromosomes (2n = 42) . As in humans, sex chromosomes determine sex: XX in females and XY in males. What is the total number of chromosomes present in the cell during metaphase I of meiosis?

• A) 21
• B) 42
• C) 84
• D) 126
• E) 168

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Active Sexual Lifestyle

Engagement in sexual activities regularly, with the implication of having multiple sexual partners or frequent sexual relations.

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Sexual activity involving the insertion of the penis into the vagina.