Multiple Choice
In the context of sex chromosomes, how many total chromosomes are present in a normal human somatic cell?
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3. Extensions to Mendelian Inheritance
Sex Chromosome
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In humans, how many total chromosomes are typically present in each somatic cell?
A
44
B
46
C
48
D
23
Verified step by step guidance1
Understand that humans are diploid organisms, meaning each somatic cell contains two sets of chromosomes—one set inherited from each parent.
Recall that the haploid number (n) in humans is 23, which represents the number of chromosomes in gametes (sperm or egg cells).
Since somatic cells are diploid, calculate the total number of chromosomes by multiplying the haploid number by 2: \$2 \times 23$.
This calculation gives the total number of chromosomes present in a typical human somatic cell.
Recognize that this total number is 46 chromosomes, which includes 22 pairs of autosomes and 1 pair of sex chromosomes.
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