HEREDITY
NONDISJUNCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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22 autosomes and an X chromosome
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22 autosomes and an Y chromosome
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44 autosomes and 2 X chromosomes
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44 autosomes and an X and a Y chromosome
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Detailed explanation-1: -Twenty-two of these pairs, called autosomes, look the same in both males and females. The 23rd pair, the sex chromosomes, differ between males and females. Females have two copies of the X chromosome, while males have one X and one Y chromosome. The 22 autosomes are numbered by size.
Detailed explanation-2: -Each sperm cell contains 23 chromosomes : 22 autosomes and one sex chromosome (X or Y).
Detailed explanation-3: -Human sperm (and eggs) are in the haploid state, meaning that only have one copy of each chromosome, or 22 autosomes and one sex chromosome (either X or Y).
Detailed explanation-4: -So the correct option is ‘sperm cell’.
Detailed explanation-5: -Definition. Containing one copy of each chromosome. Human gametes (egg and sperm cells) are haploid, containing 22 autosomes and one sex chromosome.