How Many Chromosomes Does A Human Cell Have?


15 Answers

Kath Senior Profile
Kath Senior answered
A human body cell, such as those that make up skin, kidney tissue, heart tissue and blood vessels all contain 46 chromosomes. The chromosomes are arranged in pairs, so that each cell has 23 pairs. In females, each of the pairs are identical but in males, one pair, the sex chromosomes are different. While women have two X chromosomes, men have and X chromosome and a Y chromosome.
Each chromosome contains, on average, 4000 genes and in total, the human genome consists of about 30 000 genes.

There are two cell types that are exceptions to the rule of having 23 pairs of chromosomes - gametes, otherwise known as sex cells have only 23 individual chromosomes - they have half the normal complement of genes and chromosomes. This is because when the female gamete, the egg, is fertilised by the male gamete, the sperm, the two individual sets of chromosomes come together to form a fertilised egg with the full 23 pairs, one pair from each parent.
Anonymous Profile
Anonymous answered
Two type of chromosomes in human body
Anonymous Profile
Anonymous answered
46chromosomes and 23pairs
Edia Rex-Ogbuku Profile
Edia Rex-Ogbuku answered
Humans have 22 pairs plus the two sex chromosomes (two X chromosomes in females, one X and one Y in males).
bb mohd Profile
bb mohd answered
A human cell has 46 double stranded(sister) chromosomes,22 pairs are somatic and the last pair is sex-determining either xx(female) or xy (male).
venkatesan kumaresh Profile
47 chromosomes
thanked the writer.
aileeny commented
This is incorrect. The answer is 46 ( normal!) . There are 22 pairs of autosomes and 1 pair of sex chromosomes, xx female and xy in the male //////A downs syndrome child has 47, which is abnormal and causes the syndrome. //Downs children are trisomic for chromosome no. 21. Meaning they have 3 copies of ch. 21 instead of 2 copies. There are also other chromosome abnormalities causing several conditions

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