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Chromosome sets of four individuals are ...

Chromosome sets of four individuals are given below `44A + XXY, 44A + XO, 45A + XX, 45A + XY.`
a. How many body chromosomes and sex chromosomes are present in normal male and females?
b. Identify and write the names of chromosomal abnormalities in the above listed chromosome sets.
c. Down's syndrome is seen in both sexes. Comment.

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a. 22 pairs of autosomes and one pair of allosomes.
b. Klinefelter.s syndrome, Turner.s syndrome, Down.s syndrome (female), Down.s syndrome (male)
c. Down.s syndrome is trisomy in 21st chromosome. Hence autosomal abnormality doesn.t affect the sex.
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Match column I with column II and select the correct option from the given codes {:(,"Column I",,"Column II"),("A.","Chromosomal aberration","(i)","An additional sex chromosome"),("B.","Down' syndrome","(ii)","Inversion"),("C.","Klinefelter's syndrome","(iii)","Presence of an extra chromosome"),("D.","Turner's syndrome","(iv)","Absence of sex chromosome"):}

Match column I with colimn II and select the correct option from the given codes {:(,"Column I",,"Column II"),("A.","Autosomal recessive trait","(i)","Down's syndrome or monogolism"),("B.","Sex-linked rec essive trait","(ii)","Pheylketonuria"),("C.",underset("to autosomal recessive trait")"Metabolic erorr lined","(iii)","Haemophilia"),("D.","Additional 22st chromosome anaemia","(iv)","Sickle cell"):}

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