HEREDITY
NONDISJUNCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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22 autosomes and two Y-chromosomes.
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22 pairs of autosomes and two Y-chromosomes.
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22 pairs of autosomes, one X and one Y-chromosome
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22 autosomes and two X-chromosomes
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Detailed explanation-1: -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. One copy of each chromosome pair came from the individual’s mother and the other from the individual’s father.
Detailed explanation-2: -So the correct option is ‘sperm cell’.
Detailed explanation-3: -Each gamete, the sex cell from each parent, will have 22 autosomes and one sex chromosome.
Detailed explanation-4: -In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46. Twenty-two of these pairs, called autosomes, look the same in both males and females.
Detailed explanation-5: -Scientists have numbered the chromosome pairs from 1 to 22, with the 23rd pair labeled as X or Y, depending on the structure. The first 22 pairs of chromosomes are called autosomes. The 23rd pair of chromosomes are known as the sex chromosomes, because they decide if you will be born male or female.