0
What else can I help you with?
Under what condition can a female acquire an X recessive disorder?
Both X chromosomes must carry the recessive trait. Since males only have one X chromosome, it is much easier for males to have the recessive phenotype. Put another way, a female would have to receive an X chromosome with the recessive gene from both parents, which would mean the father already displays the recessive disorder.
In the family tree below people with the recessive trait of attached earlobes are shaded gray.?
a male with one recessive allele
Is blonde hair recessive or dominant?
Recessive gene of X chromosome. more common in men as they have only one x chromosome but in female there are 2 X chromosome. If one of X chromosome in female has this recessive gene, they become a carrier. If both the X chromosome in female has this gene, they show baldness
Is hemophilia co dominant or dominant?
It is very much recessive with only one exception, which is that there is a large portion of women who simply carry the trait but dont actually have it. If you are to procreate with a female carrier than your chances of having a hemophiliac child are still not very high. You can find all the info you need by using a Punnett Square method to figure out the chances of hemophiliac children with 2 parents.
What are two forms that a gene or allele may take?
A gene or allele may take a dominant form, or a recessive form. If the allele is recessive, the characteristic which is coded for will be exhibited only if both the gene from the male and the gene from the female is recessive. Only one copy of a dominant allele is required to cause expression of the dominant characteristic
How often do you get a yellow puppie with a yellow male lab and a black female lab?
If the female carries the recessive gene necessary for yellow coloring, about 50% of the time. If she does not, never.
Does sickle cell disease require two allele or multiple alleles?
Sickle cell disease is an autosomal reccessive sexlinked trait so, a female msut have 2 recessive alleles to have the trait and a male needs only one allele (this is because there is no corresponding site for this allele on the Y chromosome. The female can be a carrier of the disorder with the defective allele on one X chromosome and a normal allele on the other X chromosome. Female carrriers can have a mixture of normal and abnormal redblood cells.
What genes are present in the eggs if the female is ressesive for both traits?
If the female is recessive for both traits, she would carry two copies of the recessive gene for each trait. Therefore, the eggs from this female would all carry two copies of the recessive gene for each trait.
Can a person be a carrier for a dominant genetic disorder?
Anyone can be a carrier of a recessive genetic disorder (as long as it is not associated with the sex chromosomes) no matter what their gender since "carrier" refers to an individual that is heterozygous for the recessive allele and therefore phenotypically normal. Specifically, sexlinked genetic disorders can be "carried" by a heterozygous female but males (having only one X chromosome) cannot. Males will either be free of the defective gene or be affected.
If a daughter expresses an x-linked recessive gene she inherited the trait from?
If a daughter expresses an X-linked recessive gene, she inherited the trait from her father who carries the gene on his X chromosome. Since males only have one X chromosome, if they have the gene, daughters will always inherit it from their father.
Under what condition can a female acquire an X recessive disorder?
Both X chromosomes must carry the recessive trait. Since males only have one X chromosome, it is much easier for males to have the recessive phenotype. Put another way, a female would have to receive an X chromosome with the recessive gene from both parents, which would mean the father already displays the recessive disorder.
Who is a person that is a carrier for a sex-linked recessive disorder?
Usually female.
Why do a man with AB blood and a female with A blood have a offspring with B blood?
The female would have to have the blood genotype of AO. The recessive O is masked by the female with the domaint A allele. Their offsprings genotype would be BO the B would be from the father and the recessive O from the mother.
In the family tree below people with the recessive trait of attached earlobes are shaded gray.?
a male with one recessive allele
How do you write genes to express dominat and recessive?
Dominant: upper case letterRecessive: lower case letterUsually the letter that is used is the first letter of the recessive trait, for instance since albinism is a recessive trait, someone who is an albino would have aa. Someone who is not would either be Aa or AA.In other examples you use a upper case letter and a superscript letter, usually the first letter of the name. For instance daltonism, which is recessive and linked to the X chromosome, would be XDXd for a female carrier, XdXd for a daltonic female and XdY for a daltonic male.For blood types, for type O, which is recessive, would be ii. Type A would be either IAi or IAIA. Type B would be either IBi or IBIB and type AB would be IAIB.
Why are sex linked traits observed more in males?
XX = Female XY = Male If there is a sex linked trait and it is recessive and will generally be on the X chromosome the statistical analysis will show that men will express this trait more often since they have only one X chromosome.
Is blonde hair recessive or dominant?
Recessive gene of X chromosome. more common in men as they have only one x chromosome but in female there are 2 X chromosome. If one of X chromosome in female has this recessive gene, they become a carrier. If both the X chromosome in female has this gene, they show baldness
