0
- whene the gene are always expressed in x chromosomes it will appear into y chromosomes because the female have y chromosome
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoBecause a female doesn't have a y chromosome.
xx female
xy male
Add your answer:
Earn +20 pts
What are sex-link genes and their effects?
Since males are the only sex to have a y chromosome, only males can get genes that are linked to the Y chromosome. This means that some genetic diseases and conditions are more likely to be male such as color blindness.
What is a trait that is passed from parent to child on the X chromosome called?
Recessive traits on X chromosome are expressed in males because they have only one copy of X chromosome. If they have any recessive gene it will be expressed. In female both the genes should be recessive then only the recessive character will be expressed.
What kind of chromosomes do male transmit to offspring?
Males transmit one X chromosome and one Y chromosome to their offspring. There are very few genes carried on the Y chromosome.
What does chromosomes mean-?
A chromosome is a DNA strand, that is comprised of genes. The two sex chromosomes are XX in females and XY in males.
What does it mean for a female to be a carrier of an x linked trait?
They can, including hemophilia, which is almost always fatal for them. Its just much rarer since the Y chromosome is best thought of as a crippled X.
Why is colour blindness more common in males?
The genes that produce photopigments are carried on the X chromosome; if some of these genes are missing or damaged, color blindness will be expressed in males with a higher probability than in females because males only have one X chromosome (in females, a good gene on only one of the two X chromosomes is enough to yield the needed photopigments).
What are sex-link genes and their effects?
Since males are the only sex to have a y chromosome, only males can get genes that are linked to the Y chromosome. This means that some genetic diseases and conditions are more likely to be male such as color blindness.
Why is colorblindness found to be inherited into males more than females?
Most color deficiencies are sex linked, meaning the defective genes are on the sex chromosome. In this case, the X chromosome is affected. Since males only have one X chromosome, all males with this particular defective genes will have this condition. Females have 2 X's, it's unlikely that both X's have bad genes at the same time.
A gene located on the X or Y chromosome is a?
Genes located on the X or Y chromosome are referred to as sex-linked genes. This is because the inheritance of these genes is dependent upon the sex of the individual. For example, only males can inherit genes located on the Y chromosome (because males have XY and females have XX).
What is a trait that is passed from parent to child on the X chromosome called?
Recessive traits on X chromosome are expressed in males because they have only one copy of X chromosome. If they have any recessive gene it will be expressed. In female both the genes should be recessive then only the recessive character will be expressed.
Why do males and females express X-linked alleles differently?
X-linked recessive traits that are not related to feminine body characteristics are primarily expressed in the observable characteristics, or phenotype of men. This is due to the fact that men only have one X chromosome. Subsequently, genes on that chromosome not coding for gender are usually expressed in the male phenotype even if they are recessive since there are no corresponding genes on the Y chromosome in most cases. In women, a recessive allele on one X chromosome is often masked in their phenotype by a dominant normal allele on the other. This explains why women are frequently carriers of X-linked traits but more rarely have them expressed in their own phenotypes.
What are threadlike structures in a nucleus of cells that contain genes?
chromosome
What kind of chromosomes do male transmit to offspring?
Males transmit one X chromosome and one Y chromosome to their offspring. There are very few genes carried on the Y chromosome.
What does chromosomes mean-?
A chromosome is a DNA strand, that is comprised of genes. The two sex chromosomes are XX in females and XY in males.
What does it mean for a female to be a carrier of an x linked trait?
They can, including hemophilia, which is almost always fatal for them. Its just much rarer since the Y chromosome is best thought of as a crippled X.
Under what condition is a single recessive allele expressed in a male?
Recessive alleles are expressed if there is no dominant allele (of the same gene) present. This can be for two reasons, because the other allele is also recessive, or because there is no other allele (such as X-linked genes, which males only have one copy of).
How are sex-linked genes expressed differently in the phenotype of males and females?
i dont know.. im looking for the answer... XD
