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An X linked carrier is one who carries a mutation in a gene found on the X sex chromosome. A carrier of the trait doesn't display phenotypic symptoms of the disease or mutation but can transfer the mutation in that gene to their offspring (ex: the carrier of a premutation that when transferred to the offspring via the X chromosome will cause the full mutation associated with that gene). A person could be a homozygous carrier if for instance, she were female (two X chromosomes) and carried the premutation associated with the disease. Some diseases need both alleles of the gene to be mutated. If only one allele is mutated (heterozygote) that person may be a carrier for that mutation and can thus pass on that mutation to their children.
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How many genotypes are possible in a pedigree of sex linked traits?
xx = normal female x- x = carrier female x- x- = female which has the sex-linked trait xy = normal male x- y = male which has the sex-linked trait
If someone is a heterozygous carrier of the tay-sachs gene what is their genotype?
if someone is a Heterozygous carrier of Tay-Sachs they would have to be Tt. Because TT is Homozygous.
What is the genotpe of a female carrier of a sex-linked genetic disorder?
Human females have an XX genotype while males have XY. In some organisms this is opposite or entirely different. A sex linked trait means that it is carried on either the X chromosome or the Y. If the sex linked trait is carried on the X chromosome and a female's father is a carrier for that trait then she would inherit it from her father because her father can only giver her his X chromosome. The father being a "carrier" means his X chromosome would have the trait but his Y chromosome would not because it is not carried on the Y and he would not display the phenotype for this trait. If the mother displays the phenotype for the trait then her daughter will as well because she can only give an X chromosome to her daughter. So to answer your question the woman would have an XX genotype (excluding abnormalities such as turner's syndrome and triple X syndrome)
In Which statements is true of linked alleles?
With one copy will be a carrier but not have a the disorder
Is sickle cell disease autosomal or x-linked or chromosomal?
Sickle cell is a sex-linked trait, If some one is a carrier than the trait is passed down on that chromosome.
What chromosomes does hemophilia occur on?
Hemophilia is a X linked recessive disorder. Usually the mother is an unaffected carrier and her son unfortunately receives the X chromosome in which hemophilia is linked to.
Why are X linked traits more common in mals then in females?
This is because males have one X chromosome while females have two. Example: Say a mother is homozygous for a certain recessive X-linked trait (ie x*x*) while the father does not have this x-linked trait (XY) If they have one boy and one girl: The girl will receive an x chromosome from each parent, and will be x*x: this means she will be a carrier only, and will not display this recessive trait. The boy will receive an x chromosome from his mom and a y chromosome from his dad, so he will have to be x*y. The boy will always display the trait. It works similarly if the mother is a carrier(ie x*x): the boy is more likely to display the trait because he gets only one x chromosome.
How many genotypes are possible in a pedigree of sex linked traits?
xx = normal female x- x = carrier female x- x- = female which has the sex-linked trait xy = normal male x- y = male which has the sex-linked trait
Can a male be homozygous for a sex linked character?
yes
How are carrier-linked prodrugs activated?
Carrier-linked drugs are often activated through hydrolysis.
What are the different types of carrier-linked prodrug?
The different types of carrier-linked prodrugs are bipartite, tripartite, and mutual. Bipartite structures consist of a carrier linked to a prodrug. Tripartite structues have a carrier linked to a drug via a linker. Mutual structures have two drugs linked to each other.
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.
What is an individual who has the genotype DD called?
homozygous first filial organism,which can undergo mutation or which may be cross-linked or made to breed with other.
If someone is a heterozygous carrier of the tay-sachs gene what is their genotype?
if someone is a Heterozygous carrier of Tay-Sachs they would have to be Tt. Because TT is Homozygous.
Why can the father not be homozygous for a dominant trait?
Homozygousity is defined as having the two alleles that are the same for a certain locus. For example, AA or AA are both homozygous. Dominance, however, is a different concept and it is independent of homozygousity. In addition, both dominance and homozygousity are independent of the sex of the individual (unless the trait is X-linked) Therefore, the three possibilities of homozygous dominant, heterozygous, and homozygous recessive for a trait are available for a male just as a female individual.
What is a carrier in?
Genetically, a carrier is someone who is carrying a defective allele but doesn't display any of it's characteristics. For example: If a male (with chromosomes X and Y) has a dud X chromosome, he will undoubtedly show the characteristic that come with it. However, if a female (with chromosomes X and X) has the defective X chromosome, the symptoms will not be displayed due to the other, intact X chromosome. (assuming that the characteristic is recessive and not dominant) The female is a Carrier A carrier refers to someone who has a recessive gene that is not expressed (heterozygous). Such a trait is only expressed when an individual has two recessive genes (homozygous recessive). In humans, the gene for albinism is recessive. Any of us with normal pigmentation may be carriers for this trait. Parents who are both carriers will have a 1 in 4 chance of havibg an albino child. Genes (alleles) do not have to be "defective " to illustrate carriers. People with hitch-hiker's thumb are homozygous recessive. People with straight thumbs may be carriers (heterozygous) or have two dominant genes. "Carrier" can also refer to a molecule which transfers an ion or functional group to another molecule, e.g. NADP is a hydrogen ion carrier, Coenzyme A is an acetate carrier.
In biology an individual who has one copy of a recessive autosomal allele that causes disease in the homozygous condition?
carrier
