Multiple Choice
What is the genetic makeup (karyotype) of an individual with Jacob's syndrome?
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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 present in a human sex cell (gamete)?
A
46
B
22
C
23
D
44
Verified step by step guidance1
Understand that human body cells (somatic cells) are diploid, meaning they contain two sets of chromosomes, one from each parent, totaling 46 chromosomes.
Recognize that sex cells (gametes), such as sperm and egg cells, are haploid, meaning they contain only one set of chromosomes to ensure that when fertilization occurs, the resulting zygote has the correct diploid number.
Recall that the diploid number in humans is 46 chromosomes, so the haploid number, which is the number of chromosomes in a gamete, is half of that.
Calculate the haploid number by dividing the diploid number by 2 using the formula: $\text{haploid number} = \frac{\text{diploid number}}{2}$.
Conclude that the number of chromosomes in a human sex cell (gamete) is 23.
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