Why do two daughters of a hemophilia father no carry the gene?
There are a few ways this could happen.
1) First, if the father has Acquired Hemophilia, it is not genetic and thus would not be passed to his daughters.
2) Adoption - A father only passes the genes to his daughters if they were in fact conceived with his DNA. (obviously there are other ways that daughters may not have been conceived by the father that raises them, but I;ll leave those to your imagination)
3) While being almost impossible (similar odds to being struck by lightening 5 separate times and surviving all 5) a random mutation could in theory correct the existing mutation.
4) Assuming the father has genetic hemophilia and was the sperm donar for the daughters in question, it is actually likely that the tests were wrong. Often females can test erroneously negative for being carriers until their early to mid 20s.
Does mutation occur in klinefelter syndrome?
Mutation of a gene is not necessary for Klinefelter's Syndrome. It is an autosomal disorder meaning that an entire chromosome failed to disjunction during anaphase and so there are 2 X chromosomes and a Y chromosome.
What genetic disorder is characterized by retina defects?
Tay-Sachs disease has an eye spot that is red on the back of the retina.
What community is most at risk for down syndrome?
Older women who give birth have a much higher chance of having a baby with Down syndrome than do other women.
What disorder is likely to be inherited by more males than females?
Those transmitted on the Y chromosome (girls don't have a Y) Examples include reg/green color blindness.
What is a disadvantage to be a male when it comes to sex-linked genetic disorders?
Because male have only one X chromosome.Y is not completely homologus to X.So disorders in X affects mainly to male.
What would happen to an organism with defective enzymes?
They would not live vary long. enzymes break things down like nutrients in the body. Your saliva is an example of an enzyme. Without enzymes your body couldn't break down the things that it needs to in order for it to survive.
How does human werewolf syndrome affect people?
some people think it is cool but some people who have are really embarrased to go in front of people
like above,yes,some ppl think it would be awsome to be a werewolf,but we ARE embarresed to be around ppl,cause we feel unwanted,like ppl think were freaks.because we act different,and have different instincts.
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.
Which of the following statements about mutations and genetic disease are correct?
Mutations can result from spontaneous events or external mutagens.
A change in DNA sequence may change the pattern of protein folding, resulting in genetic disease.
Some genetic diseases may be caused by the substitution of only one incorrect amino acid in a protein.
It is possible for the substitution of one base for another to have no effect on an organism.
Is klinefelter's syndrome monosomy or trisomy?
A trisomy. A monosomy is when there is only one of a chromosome. A trisomy is when there are three of a chromosome. In Klinefelter's syndrome, there are three sex chromosomes.
Is cloning good thing or bad thing?
cloning is a very bad thing. in most cloning abilities one of the side effects is that the clone turns bad, half the world is after you and not to mention the clones will be verypowerful.
To be very honest, I am against it, but if it is going to help world poverty, by for instance cloning really good food sources, or helping eradicate terrible diseases, then I am all for it
What is the life expectancy of a newborn with schizencephaly?
This varies considerably, depending upon the size of the clefts in the cerebrum and the degree of overall neurologic deficits.
What is wrong with my chin it grew out and its has two bones coming out but soft in the middle?
i used to have a round face but now my chin is pointing out all of a sudden. its weird because the tip of my chin has two bones sticking out if you fell it and its soft in the middle. plz help
Are people's kids affected if they have cystic fibrosis?
As cystic fibrosis is a genetic disease so I think it's possible that this disease will be found in their kids. Now there are so treatments available in medical science to control it like "salt room therapy " which you can try using "Halotherapy devices" easy to get from "salinetherapy"
Why can only females be carriers of sex-linked genetics disorders?
This is not an entirely accurate statement, but it is generally true. It happens because sex-linked genes are located on the X chromosome only. Males have only one X chromosome (XY) and the corresponding Y chromosome from their fathers do not have genes for sex-linked traits, including color vision and proper blood clotting.
If a mother has normal color vision but carries a gene for color blindness on her other X chromosome, her genotype is Cc. If she has a daughter and that daughter inherits her mother's recessive gene, it is usually balanced by her father's X chromosome if he has normal color vision, and the daughter would be Cc like her mother.
However, although they are rare, a colorblind female is possible if her mother is a carrier (or is color blind, cc) and her father is colorblind also.
However, a son only inherits one X chromosome, so he is totally dependent on which X chromosome his mother gives him. His father's Y chromosome, which makes him male, does not have this gene on it. The son has a 50-50 chance of inheriting his mother's color blind gene, and if he does, he will be colorblind based on the gene inherited from his female parent. His male parent donated a Y chromosome, which has no genes for this trait on it, so the mother alone determines this trait in her sons.
A chromosome that lacks a partner and in which destroys or deletes itself.
Who can get Williams syndrome?
Williams syndrome is a genetic condition that is present at birth and can affect anyone. It is characterized by medical problems, including cardiovascular disease, developmental delays, and learning disabilities. These occur side by side with striking verbal abilities, highly social personalities and an
affinity for music.
Williams syndrome affects 1 in 10,000 people worldwide - an estimated 20,000 to 30,000 people in the United States. It is known to occur equally in both males and females and in every culture.
Unlike disorders that can make connecting with your child difficult, children with Williams syndrome tend to be social, friendly and endearing. Parents often say they could not have imagined the joy and perspective their child with Williams syndrome has brought into their lives. Nearly everyone with Williams syndrome loves music, and for some, there is a musicality and eventual talent for music that is far greater than would be expected based on general functioning levels.
There are major struggles as well. Many babies have life-threatening cardiovascular problems.Children with WS need costly and ongoing medical care, and early interventions (such as speech or occupational therapy) that may not be covered by insurance or state funding. As they grow, they struggle with things like spatial relations, numbers and abstract reasoning, which can make daily tasks a challenge. And as adults, most people with WS need supportive housing to live to their fullest potential. Just as important are opportunities for social interaction. Adults with Williams syndrome often experience intense isolation which can lead to depression. They are extremely sociable and experience the normal need to connect with others; however people with Williams syndrome often don't process nuanced social cues and this makes it difficult to form lasting relationships.
Other characteristics common to Williams syndrome are:
Hypercalcemia (elevated blood calcium levels)
Low birth-weight / slow weight gain
Feeding problems
Dental abnormalities
Kidney abnormalities
Hernias
Hyperacusis (sensitive hearing)
Musculoskeletal problems
Information provided by the Williams Syndrome Association (WSA). For additional information, please visit the WSA's web site at http://www.williams-syndrome.org
it describes hair growth on the body in an amount considered abnormal,extensive cases of hypertrichrosis have informally been called werewolf syndrome
Will a heterozygous female with hemophilia have blood that will clot normally?
Yes, because Hemophilia is recessive (if you have a normal allele, you won't have hemophilia, and heterozygous means that you have one normal and one abnormal allele).
these are the choices chose one plz
1) the genetic code changes as the cells divide
2) diifferent segments of the genetics instruction are used to produce different types of cells
3) different genetic instruction are synthesized to meet the needs of new types of cells
4) some parts of genetic materials are loast as a result of fertilization
which one is it??
The option is 3 as it depend upon genetic instruction especially during the processing and formatio of mRNA...