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What do half shaded circles mean for pedigrees?
In pedigree charts, half-shaded circles represent individuals who are carriers of a specific genetic trait or disorder but do not express the trait themselves. This typically indicates that the individual has one copy of the recessive allele associated with the trait, while the other copy is dominant. Carriers can pass the recessive allele to their offspring, potentially resulting in affected individuals if both parents are carriers.
What is the probability of them having a blue eyed child?
The probability of having a blue-eyed child depends on the genetic makeup of the parents. If both parents carry the recessive allele for blue eyes (Bb), where "B" represents the brown eye allele and "b" represents the blue eye allele, there is a 25% chance of having a blue-eyed child (bb). If one or both parents have brown eyes but carry the blue eye allele, the probability may vary. If neither parent has the blue eye allele, the probability of having a blue-eyed child is 0%.
What is a recessive allele?
Recessive allele is a trait that doesn't show in one's phenotype (observable trait) if there is a dominant allelle present. Only when you inherit a recessive allele from both parents (aa for example and not Aa) does the trait show in your phenotype.
What is the probability that a particular allele will be in a gamete?
chromosome segregationIf the character is governed by a single allele and it is dominant, than its probability to be in the gamete is 75%.
If a dominant homozygous reproduced with a heterozygous could their offspring be recessive?
Let's see what combinations can be formed.HH, HH, Hh, Hh.So, yes their offspring can contain the recessive allele.(THe offspring can be a carrier of the recessive allele.)However, since it is impossible for the offspring to be homozygous recessive,the recessive trait/gene will not show in the offspring's phenotype.Hope that helps!
What is the probability a woman heterozygous for an x-linked trait will have a son with a genetic disorder if the genetic disorder is recessive?
The probability would be 0.5 or 50%. A heterozygous woman will pass on the X chromosome with the recessive allele to 50% of her sons, and since the disorder is recessive, the son would only have the disorder if the X chromosome with the recessive allele is inherited from the mother.
Why were heterozygous individuals called carriers for non-sex-linked and x-linked recessive patterns of inheritance?
I don't know and don't care
What is a heterozygous indivisual who doesnt show a reccesive genetic disorder but who can pass a reccesive allele on to their offspring is called what?
The individual is called a carrier. This means they carry a recessive allele for a genetic disorder, but they do not exhibit symptoms of the disorder themselves. However, they can pass on the recessive allele to their offspring.
Does the Carriers of genetic diseases who do not have the disease themselves have recessive genes for the disorders?
Yes, carriers of genetic diseases typically have one normal allele and one mutated allele for the disorder, which means they possess recessive genes. They do not express the disease phenotype because the normal allele is sufficient to mask the effects of the recessive allele. However, they can pass the mutated allele to their offspring, potentially leading to the expression of the disease if the child inherits another mutated allele from the other parent.
If both heterozygous parents are carriers of a recessive allele for phenylketonuria the probability that a given child of these parents will have PKU is?
The probability that a given child will have PKU is 25%. This is because both parents are carriers of the recessive allele (heterozygous), so there is a 25% chance that they will each pass on the recessive allele, resulting in the child having PKU.
What does recessive allele disorders mean?
Recessive allele disorders are just as they sound - they are disorders that are a result of a prevalent recessive allele in one's genetic makeup. A recessive allele disorder will rarely occur since it is dependent on the crossing of two heterozygous parent cells, but it can lead to interesting consequences. An example of a recessive allele disorder is hemophilia - the body's inability to clot blood - and it has affected much of the European royalty in history, such as Queen Victoria of Great Britain.
What is an individual who has a recessive disease causing allele?
An individual with a recessive disease-causing allele carries one or two copies of the allele for the disease but may not exhibit symptoms if they have a dominant normal allele. If they have two recessive alleles, they will typically express the disease. Carriers, who possess one recessive allele and one normal allele, can pass the allele to their offspring, potentially leading to the disease in subsequent generations if both parents are carriers.
What is the name of the gene pair that consist of a dominant allele and recessive allele?
The name of the gene pair that consists of a dominant and recessive allele, i.e. (Xx) will be a heterozygous allele. In this situation, the characteristics of the dominant characteristic will mask that of the recessive allele. People have have a heterozygous genotype may be carriers for diseases that reside on the recessive allele.
What does recessive disorder mean?
Recessive allele disorders are just as they sound - they are disorders that are a result of a prevalent recessive allele in one's genetic makeup. A recessive allele disorder will rarely occur since it is dependent on the crossing of two heterozygous parent cells, but it can lead to interesting consequences. An example of a recessive allele disorder is hemophilia - the body's inability to clot blood - and it has affected much of the European royalty in history, such as Queen Victoria of Great Britain.
What do half shaded circles mean for pedigrees?
In pedigree charts, half-shaded circles represent individuals who are carriers of a specific genetic trait or disorder but do not express the trait themselves. This typically indicates that the individual has one copy of the recessive allele associated with the trait, while the other copy is dominant. Carriers can pass the recessive allele to their offspring, potentially resulting in affected individuals if both parents are carriers.
In a heterozygote the allele that does not affect the trait?
The allele that does not affect the trait in a heterozygote is known as the recessive allele. This allele is masked by the dominant allele, which determines the observable trait. However, the recessive allele can still be passed on to offspring if both parents are carriers.
In humans heterozygotes are referred to as particularly when the recessive allele is associated with a genetic disease?
carriers
