Help me and explain me 5. What is the term that describes most X-linked genes in
ID: 207128 • Letter: H
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Help me and explain me
5. What is the term that describes most X-linked genes in males? a) Hemizygous b) Homozygous c) Heterozygous d) Holozygous 6. What compensates for different numbers of X chromosomes in humans? a) Hyperactivation of genes on male X chromosome b) Hypoactivation of the genes on the female X chromosomes c) Inactivation of one X chromosome in females d) No compensation is needed 7. A human with a normal X chromosome and a Y chromosome that lacks the SRY region will be phenotypically a) Male b) Female 8. A human male with an XXY genotype will have how many Barr bodies? c) 2 d) 3 a) 0- only females have Barr bodiesExplanation / Answer
5.
The term which describes most X linked genes in males is often referred to as hemizygous.
Option a is the correct answer
6.
Compensates for a different numbers of X chromosomes in humans occurs by dosage compensation. In females, generally one X chromosome is inactivated.
option c is the answer
7.
A human with a normal X chromosome and a Y chromosome that lacks the SRY region will be phenotypically females.
As SRY region on Y chromosomes is necessary for male sex determination in humans.
Option a
8.
Generally females have barr bodies. Given genotype is of males as it contains one Y chromosome.
Hence option a suits best.
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