Textbook Question
A wild-type Drosophila male and female are crossed, producing 324 female progeny and 161 male progeny. All their progeny are wild type.
Propose a genetic hypothesis to explain these data.
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3. Extensions to Mendelian Inheritance
Sex Chromosome
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
How many chromosomes are typically found in a normal human somatic cell?
A
23
B
46
C
44
D
48
Verified step by step guidance1
Understand that human cells can be categorized into somatic cells and gametes. Somatic cells are all body cells except the reproductive cells.
Recall that humans have 23 pairs of chromosomes, where each pair consists of one chromosome from the mother and one from the father.
Since chromosomes come in pairs, the total number of chromosomes in a normal human somatic cell is calculated by multiplying the number of pairs by 2.
Express this calculation as an equation: \(\text{Total chromosomes} = 23 \times 2\).
Recognize that this total represents the diploid number of chromosomes in somatic cells, which is different from the haploid number found in gametes.
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