which of the following reasons explain why sex-linked diseases are more common in men than in women?

Question

A. The sex chromosomes are more active in men than in women,
B. Men who inherit only one copy of the harmful recessive gene will have the disease,
C. Men acquire two copies of the defective gene during fertilization,
D. Both A and B

Answer 1

B is correct becuase sex-linked disorders are usuallyfound on the X chromosome. In order for a female (XX) to have the disease, both of her X chromosomes must contain the gene for it (she must be homozygous for the condition). Males (XY) Need only to have it on their on X chromosome to hve the condition.

Answer 2

All chromosomes are in pairs. for each pair, you get one from the egg and the different from the sperm that fertilized the egg. in basic terms the chromosome pair that be certain intercourse that are the two xx or xy, the others adventure. in case you look at a image of chromosomes of a guy, you will word that the y is greater like an x shrink in a million/2, so the place a woman could have an unusual recessive allele cancelled out by potential of the matching allele for that gene on the x chromosome from her father, a guy won't. sort karyotype into google pictures in case you opt for for to be certain a image. Take the occasion of haemophilia. for a woman to be a haemophiliac, she ought to have the haemophilia alleles on the two chromosomes because it somewhat is brought about by potential of a recessive allele. If one chromosome has the allele and the different does not, she would be able to no longer have the circumstance yet could desire to pass on the allele to her toddlers. there's a 50/50 possibility that any of her eggs could have the haemophilia allele and if this is mixed with a sperm for a male, then there isn't any longer something to 'overrule' that allele. Edit: observed you post an edit approximately alleles, so replaced gene to allele as you know what it somewhat is

Answer 3

B. Men have only one X-chromosome, so they don't have a second chance to get the dominant allele.

Answer 4

B