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What chromosome is affected by meckel syndrome?
Meckel Syndrome (type 1)is an autosomal recessive trait carried on chromosome 17.
What unusual result suggested that the eye-color trait is located on the X chromosome?
The unusual result was that in a family, all males had the same eye color as their mothers. This suggested that the gene for eye color is linked to the X chromosome because males inherit their X chromosome from their mothers.
What are sections of a chromosome that are code for trait?
A section of chromosomes that codes for a trait can be called
If a gene is located on the human X chromosome it is more likely that a male will express the trait that the gene codes for?
Yes, because males only have one X chromosome (inherited from their mother), any gene on that X chromosome will be expressed in males. In females, both X chromosomes are present and one may be silenced through a process called X inactivation, leading to more variability in gene expression.
True or False A mutation is the part of a chromosome that carries information about a trait?
False. A mutation refers to a change in the DNA sequence of a gene or chromosome, not the specific part of a chromosome that carries information about a trait.
What chromosome is affected by meckel syndrome?
Meckel Syndrome (type 1)is an autosomal recessive trait carried on chromosome 17.
How might x inactivation cause patchy hairiness on women who have congenital generalized hypertrichosis even though the disease causing allele is dominant?
Since one X chromosome in each cell is randomly inactivated at some point during development, a woman heterozygous for hypertrichosis would have varying regions of patchy hair if the alleles responsible for the trait were located on the X chromosome. Variation would look similar to the varied tortoise shell coat color pattern on female cats, where the presence of yellow and black (red and gold/blue and cream) is controlled by X chromosome inactivation.
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)
Why are males more likely to have a sex-liked trait than females?
Males have only one X chromosome. This means that only one copy of the sex-linked trait has to be passed toa male inorder for him to have the trait. If the mother is a carrier her male offspring have a 50% chance of inheriting and having the affected phenotype. Her daughters, will have a 50% chance of being carriers of the trait and could only be affected if the father is affected,
What unusual result suggested that the eye-color trait is located on the X chromosome?
The unusual result was that in a family, all males had the same eye color as their mothers. This suggested that the gene for eye color is linked to the X chromosome because males inherit their X chromosome from their mothers.
Discuss the inheritance pattern that would be seen in a pedigree designed to study a recessive sex-linked trait?
In a pedigree designed to study a recessive sex-linked trait, affected individuals are more commonly male because they inherit the trait on their X chromosome from their carrier mother. Females need to inherit two copies of the gene (one from each parent) to be affected. The trait skips generations and can be passed down from carrier females to affected males.
What are sections of a chromosome that are code for trait?
A section of chromosomes that codes for a trait can be called
If a gene is located on the human X chromosome it is more likely that a male will express the trait that the gene codes for?
Yes, because males only have one X chromosome (inherited from their mother), any gene on that X chromosome will be expressed in males. In females, both X chromosomes are present and one may be silenced through a process called X inactivation, leading to more variability in gene expression.
A dominant x linked trait would be more common in males or females?
If the trait is recessive and on the male chromosome (Y), then it is impossible for females to get it since they do not possess a Y chromosome. If you meant a recessive sex-linked trait on the X chromosome (like male pattern baldness), then males are still more likely to get it since they only receive one X chromosome and if it is affected they would automatically have the trait (whereas females have 2 copies and would only have the trait if both parents passed on chromosomes containing the recessive allele.) Females can be carriers, though. If they are a carrier (have one affected X chromosome) for the trait then their male children would have a 50% chance of inheriting the trait and their female children would have a 50% chance of becoming carriers.
What is an example of a trait inside your body that is affected by your genes?
Male pattern baldness is a common genetic condition passed through the X chromosome that a man gets from his mother.
True or False A mutation is the part of a chromosome that carries information about a trait?
False. A mutation refers to a change in the DNA sequence of a gene or chromosome, not the specific part of a chromosome that carries information about a trait.
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.
