0
What else can I help you with?
The brother of a women's father has hemophilia her father was unaffected but she worries that she may have an affected son should she worry explain?
The woman's father being unaffected means that he does not carry the gene for hemophilia on his X chromosome. Therefore, the woman does not have the gene and cannot pass it on to her son. Her son will not inherit hemophilia from his uncle.
What is true of Y chromosomes?
The Y chromosome is one of the two sex chromosomes in humans, determining male biological sex when paired with an X chromosome. It carries genes that are crucial for male sex determination and spermatogenesis, including the SRY gene, which triggers the development of testes. Unlike the X chromosome, the Y chromosome is much smaller and contains fewer genes, and it is passed from father to son, allowing for paternal lineage tracing. Additionally, the Y chromosome has a higher mutation rate, contributing to genetic diversity among male populations.
If a trait is always transmitted directly from a father to all his sons and from those sons to all their son what chromosome would the gene for the character be likely on?
The gene for this trait is likely located on the Y chromosome. The Y chromosome is passed down from father to son, and since only males have a Y chromosome, the trait will only be passed down through male lineage.
In a family with parents who do not have hemophilia one son has hemophilia. Who was the carrier of the gene for hemophilia?
First of all, Spontaneous mutations account for 1/3 of the cases of genetic hemophilia. This means that 1 out of 3 people born with hemophilia have no family history of the trait prior to that person. In the scenario you are describing, you are assuming that there was a carrier when in fact, there is a good chance that there was not. There is also a chance that the child born with hemophilia received the mutation from his mother. Frequently women will have the mutation on one X chromosome but not their second. Depending od the individual case, the mother could carry the gene but not be symptomatic. It is impossible for the son to have received the gene from his father. Since in order for a boy to actually be a boy, he must receive his father's Y chromosome and not his X chromosome, a son cannot receive the affected X chromosome from his father. Also, in order for a father to pass the trait on through daughters, the father himself would be a hemophiliac.
What genetic material do you get from your mother?
If you are female, you receive half of your father's genetic material. If you are male, you receive almost half; the Y chromosome is missing some genes, so it is the mother's X chromosome and the genes on the top of it that solely determine certain characteristics in the son. These are called sex-linked characteristics.
A color blind son inherited this trait from?
his mother because color blindness is a sex-linked trait that is found on the X chromosome, which is inherited from the mother, as opposed to the Y chromosome, which is inherited from the father. So a male can only inherit the gene for color blindness from his mom.
Why is it impossible for a father to pass down red green color blindness to his son?
Boys have one X and one Y chromosome. Color blindness is found on the X chromosomes. Since boys will always get their X chromosome from their mother and their Y chromosome from their father, father's can never pass on red/green color blindness to their son's. However, since father's do pass their X chromosome to their daughters, they can pass on the trait to their daughters. In this case, daughters have two X chromosomes (one from their mother and one from their father), so they will NOT have red/green color blindness unless they received the defective gene from their mother AND their father. This is the reason that color blindness is 9 times more common in boys than girls.
What conditions can be passed from father to son only?
Genetic conditions carried on the Y chromosome, such as hemophilia and Duchenne muscular dystrophy, can only be passed from father to son. This is because the Y chromosome is inherited exclusively from the father.
Why can a man who has sex-linked disorder pass tge disorder to his daughters but not his sons?
The sex-linked traits you refer to are probably located on the X chromosome. Because all boys receive their Y chromosomes from their fathers (after all, the mother has no Y chromosome), they cannot also have received an X chromosome which might contain the sex-linked trait from their fathers.
The brother of a women's father has hemophilia her father was unaffected but she worries that she may have an affected son should she worry explain?
The woman's father being unaffected means that he does not carry the gene for hemophilia on his X chromosome. Therefore, the woman does not have the gene and cannot pass it on to her son. Her son will not inherit hemophilia from his uncle.
Why can only the female pass hemophilia down to a son?
Males have one X chromosome and one Y chromosome while females have 2 X chromosomes. Thus wen a son is born, he inherits his father's Y chromosome and one of his mother's X chromosomes. Since the trait for hemophilia is located on the X chromosome, it must either be passed down from the mother or result from a spontaneous mutation.
What is true of Y chromosomes?
The Y chromosome is one of the two sex chromosomes in humans, determining male biological sex when paired with an X chromosome. It carries genes that are crucial for male sex determination and spermatogenesis, including the SRY gene, which triggers the development of testes. Unlike the X chromosome, the Y chromosome is much smaller and contains fewer genes, and it is passed from father to son, allowing for paternal lineage tracing. Additionally, the Y chromosome has a higher mutation rate, contributing to genetic diversity among male populations.
If a trait is always transmitted directly from a father to all his sons and from those sons to all their son what chromosome would the gene for the character be likely on?
The gene for this trait is likely located on the Y chromosome. The Y chromosome is passed down from father to son, and since only males have a Y chromosome, the trait will only be passed down through male lineage.
Can a mother give a sex-linked trait to her son and her daughter?
The short answer is yes! The allele responsible for a sex-linked trait is carried on the X chromosome which a mother passes on to both sons and daughters. However, since sons have only that one X chromosome (from the mother - the other is the Y from the father) then even a recessive trait will always show up in the son. It is unlikely to show up in the daughter since the daughter inherits a second X chromosome from the father and since most traits are recessive then the 'normal' allele on the paternal X chromosome will mask the recessive one inherited from the mother. This is why the vast majority of people in the population showing a sex-linked trait are males. However, if the daughter were to inherit the recesisive allele from the father (as well as the mother) then she would be homozygous and the trait would show up....
Are most sex linked disorders passed from mother to son?
true
Sex-linked diseases are more likely to affect sons of female carriers because why?
The son would automatically get the Y chromosome from the father. The son's X chromosome has to come from his mother. Females are XX, so he has a fifty-fifty chance of receiving the disease carrying gene. If he receives the disease carrying gene he will have the disease, if he doesn't then he will neither have the disease nor be a carrier. A daughter has to receive one X chromosome from her father and one from her mother. If the father doesn't have the disease, then the daughter cannot have it. If the mother is a carrier, then she has a fifty-fifty chance of being a carrier.
Why are sex-linked diseases more likely to affect sons of female carriers?
The son would automatically get the Y chromosome from the father. The son's X chromosome has to come from his mother. Females are XX, so he has a fifty-fifty chance of receiving the disease carrying gene. If he receives the disease carrying gene he will have the disease, if he doesn't then he will neither have the disease nor be a carrier. A daughter has to receive one X chromosome from her father and one from her mother. If the father doesn't have the disease, then the daughter cannot have it. If the mother is a carrier, then she has a fifty-fifty chance of being a carrier.
