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: -The chromosomes of the 23rd pair are called autosomes consisting of two X (XX) chromosomes which occur in most females, and an X chromosome and a Y chromosome in most males. The X chromosome is always present as the 23rd chromosome in the ovum, while either an X or a Y chromosome can be present in an individual sperm.
Detailed explanation-2: -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-3: -Each sperm cell contains 23 chromosomes : 22 autosomes and one sex chromosome (X or Y).
Detailed explanation-4: -Definition. Containing one copy of each chromosome. Human gametes (egg and sperm cells) are haploid, containing 22 autosomes and one sex chromosome.
Detailed explanation-5: -A diploid cell has two complete sets of chromosomes. Most cells in humans are diploid, comprising 23 chromosome pairs, so 46 chromosomes in total. This is 22 pairs of autosomes and a pair of sex chromosomes.