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Is this true or false in females a recessive allele on the X chromosome is often has no matching allele on the y chromosomes?
True. In females, who have two X chromosomes, a recessive allele on one X can be masked by a dominant allele on the other X. However, since males have one X and one Y chromosome, any recessive allele on their single X chromosome has no matching allele on the Y chromosome, making them more likely to express traits associated with those recessive alleles.
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Why can females only be carriers of sex-linked recessive traits?
Sex-linked traits (with some exceptions) are only carried on the X chromosome. Females have two X chromosomes while males only have one. Because males only have one, they will either have the trait or they won't, but they can't be carriers. Females can have one chromosome that can have the dominant trait and the other can have the recessive trait - making this female a carrier.
Why do males get this trait twice as often as females?
Males have XY chromosomes while females have XX chromosomes. The trait is located on the X chromosome, so males have only one copy of this chromosome, making them more likely to express the trait if it is recessive. Females, on the other hand, have two X chromosomes, providing a backup copy that can mask the expression of the trait.
How traits are inherited along with sex chromosomes?
Traits are inherited through genes located on chromosomes, including sex chromosomes (X and Y). In humans, females have two X chromosomes (XX), while males have one X and one Y chromosome (XY). Traits linked to genes on the X chromosome can exhibit different inheritance patterns in males and females, as males express any recessive traits on their single X chromosome, while females may express traits only if they are homozygous for the recessive allele. Additionally, some traits are influenced by genes on the Y chromosome, which are passed from father to son.
Why are sex linked recessive disorders such as hemophilia most often seen in males and rarely seen in females?
The recessive genes are present on the X-chromosome. Female chromosome has another X-chromosome, which is dominant and masks the defective gene, and it is quite rare that both the chromosomes have recessive alleles. But, in males, the Y-chromosome has nothing to over mask the defective gene and the abnormality shows up in the form of the disease.
What is genotype for a recessive trait found on the female chromosome?
The genotype for a recessive trait found on the female chromosome typically consists of two copies of the recessive allele (homozygous recessive, e.g., "aa") or one copy of the recessive allele and one copy of the dominant allele (heterozygous, e.g., "Aa"). In females (XX), if the trait is located on one of the X chromosomes, a female must have two copies of the recessive allele on both X chromosomes to express the recessive trait. If she has one dominant allele, she will be a carrier but not express the trait.
Why are traits controlled by recessive alleles on the X chromosome are more common in males than in females?
Males only have one X chromosome, so even if the gene on that chromosome is recessive there is no other gene that could dominate it. Females have two X chromosomes, so if the gene on that chromosome is recessive there is still a chance that the gene on the other chromosome could be dominate and override it.
Why are traits controlled by recessive alleles on the X chromosomes are more common in males then in females?
In males, they only have one X chromosome, so if they inherit a recessive allele for a certain trait on their X chromosome, it will be expressed because there is no corresponding dominant allele on the Y chromosome to mask it. Females have two X chromosomes, so even if they inherit a recessive allele on one X chromosome, the dominant allele on the other X chromosome can mask its expression.
Traits controlled by recessive alleles on the x chromosome are more common in males than in females explain why?
Males only have one X chromosome, so even if the gene on that chromosome is recessive there is no other gene that could dominate it. Females have two X chromosomes, so if the gene on that chromosome is recessive there is still a chance that the gene on the other chromosome could be dominate and override it.
Why can females only be carriers of sex-linked recessive traits?
Sex-linked traits (with some exceptions) are only carried on the X chromosome. Females have two X chromosomes while males only have one. Because males only have one, they will either have the trait or they won't, but they can't be carriers. Females can have one chromosome that can have the dominant trait and the other can have the recessive trait - making this female a carrier.
Why do males get this trait twice as often as females?
Males have XY chromosomes while females have XX chromosomes. The trait is located on the X chromosome, so males have only one copy of this chromosome, making them more likely to express the trait if it is recessive. Females, on the other hand, have two X chromosomes, providing a backup copy that can mask the expression of the trait.
What type of sex chromosomes do females have?
Female have two X chromosomes while males have an X and a Y chromosome.
How traits are inherited along with sex chromosomes?
Traits are inherited through genes located on chromosomes, including sex chromosomes (X and Y). In humans, females have two X chromosomes (XX), while males have one X and one Y chromosome (XY). Traits linked to genes on the X chromosome can exhibit different inheritance patterns in males and females, as males express any recessive traits on their single X chromosome, while females may express traits only if they are homozygous for the recessive allele. Additionally, some traits are influenced by genes on the Y chromosome, which are passed from father to son.
Colorblindness is more common in males than in females because?
it is a genetic trait carried on the X chromosome. Males have only one X chromosome, while females have two. If a male inherits the colorblindness gene on his one X chromosome, he will have the condition. However, females would need to inherit the gene on both X chromosomes to be colorblind.
Why would recessive traits be more common on boys than girls?
Only sex-linked recessive traits on the X sex chromosome are more common in males. This is because males receive only one X chromosome, so they cannot be heterozygous for a trait on the X chromosome. Females inherit two sex chromosomes, so they can be heterozygous, receiving both a dominant and a recessive allele on the X chromosomes.
Why are sex linked recessive disorders such as hemophilia most often seen in males and rarely seen in females?
The recessive genes are present on the X-chromosome. Female chromosome has another X-chromosome, which is dominant and masks the defective gene, and it is quite rare that both the chromosomes have recessive alleles. But, in males, the Y-chromosome has nothing to over mask the defective gene and the abnormality shows up in the form of the disease.
What is genotype for a recessive trait found on the female chromosome?
The genotype for a recessive trait found on the female chromosome typically consists of two copies of the recessive allele (homozygous recessive, e.g., "aa") or one copy of the recessive allele and one copy of the dominant allele (heterozygous, e.g., "Aa"). In females (XX), if the trait is located on one of the X chromosomes, a female must have two copies of the recessive allele on both X chromosomes to express the recessive trait. If she has one dominant allele, she will be a carrier but not express the trait.
5 Explain why there were no white eyed female fruit flies?
The gene for eye color is only carried on the X chromosome. Since females have two X chromosomes and white is recessive, there are no white-eye females.
