PATHOLOGY MCQ
GENETICS AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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2
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23
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46
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44
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Detailed explanation-1: -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. The 23rd pair, the sex chromosomes, differ between males and females.
Detailed explanation-2: -Humans have 22 pairs of numbered chromosomes (autosomes) and one pair of sex chromosomes (XX or XY), for a total of 46.
Detailed explanation-3: -Thus, the number ‘44’ indicates the number of autosomes which are body chromosomes. Note: 44 + XX is female as there are 44 body chromosomes i.e., autosome and XX are the sex chromosomes which determine the sex of an individual. 44 + XY is male as there are there are 44 autosomes and XY are the sex chromosomes.
Detailed explanation-4: -Normal chromosomes are reported as: 44 autosomes plus 2 X chromosomes for a woman (karyotype 46, XX) 44 autosomes plus 1 X and 1 Y chromosome for a man (karyotype 46, XY)
Detailed explanation-5: -Humans have 22 pairs of autosomes and one pair of sex chromosomes (XX or XY).