Question Video: Describing the Chromosomes Present in a Human Female Somatic Cell | Nagwa Question Video: Describing the Chromosomes Present in a Human Female Somatic Cell | Nagwa

Question Video: Describing the Chromosomes Present in a Human Female Somatic Cell Biology • First Year of Secondary School

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Which of the following correctly describes the chromosomes contained within a human female somatic cell? [A] 44 autosomes + XX [B] 44 autosomes + XY [C] 46 autosomes + XX [D] 23 autosomes + XY [E] 46 autosomes + XY

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Video Transcript

Which of the following correctly describes the chromosomes contained within a human female somatic cell? (A) 44 autosomes plus XX. (B) 44 autosomes plus XY. (C) 46 autosomes plus XX. (D) 23 autosomes plus XY. (E) 46 autosomes plus XY.

In humans, we have a total of 46 chromosomes or 23 pairs of chromosomes in our somatic or body cells. Our sex cells, or gametes, contain half this number. We get one copy from our biological mother and the other from our biological father. Chromosomes are numbered based on their size. Chromosome one is the largest and chromosome 22 is the smallest. Chromosome one to 22 are called autosomes. Chromosome pair number 23 are the sex chromosomes and determine our biological sex. Biological males have a single copy of the X and Y chromosome, while biological females have two copies of the X chromosome.

Since this question is asking about the chromosomes in a female, we can eliminate answer choices (B), (D), and (E) because these contain the male sex chromosomes. And since we have 22 pairs of autosomes, or 44 autosomes in total, we can eliminate answer choice (C). Therefore, a female somatic cell will contain 44 autosomes and two sex chromosomes XX.

So the correct option is answer choice (A) 44 autosomes plus XX.

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