EMBRYOLOGY
CHROMOSOMES AND CELL DIVISIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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2
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4
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23
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46
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Detailed explanation-1: -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. Since we have two copies of each chromosome, we also have two copies of every gene.
Detailed explanation-2: -Normally, each cell in the human body has 23 pairs of chromosomes (46 total chromosomes). Half come from the mother; the other half come from the father. Two of the chromosomes (the X and the Y chromosome) determine your sex as male or female when you are born.
Detailed explanation-3: -The entire human genome contains about 3 billion bases and about 20, 000 genes on 23 pairs of chromosomes in humans.
Detailed explanation-4: -The cells that would contain a single copy of each of the human body’s 23 chromosomes are the sex, or reproductive cells, which are called gametes. In a female, this cell is the egg. In a male, it is a sperm cell. Every other cell in the body contains 23 pairs of chromosomes, or 46 in all.