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A very high ratio of 1 in 11.
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How many African Americans are carriers of sickle-cells allele?
A very high ratio of 1 in 11.
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.
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.
In humans heterozygotes are referred to as particularly when the recessive allele is associated with a genetic disease?
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.
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.
How many Africans are carriers of the sickle cell allele?
A very high ratio of 1 in 11.
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
The allele for cystic fibrosis is recessive. What does this mean?
The recessive nature of the cystic fibrosis allele means that an individual must inherit two copies of the allele (one from each parent) to express the condition. If a person has only one copy of the cystic fibrosis allele and one normal allele, they will be a carrier but will not exhibit symptoms of the disease. This inheritance pattern affects how the disease is passed on in families, with carriers having a 25% chance of having an affected child if both parents are carriers.
How many African American are carriers of the sickle cell allele?
Sickle cell trait is an inherited blood disorder that affects 1 million to 3 million Americans and 8 to 10 percent of African Americans. Sickle cell trait can also affect Hispanics, South Asians, Caucasians from southern Europe, and people from Middle Eastern countries.
Females who are carrier for hemophilia?
Females who are carriers of hemophilia possess one normal and one mutated allele of the gene responsible for the disorder, typically located on the X chromosome. While they often do not exhibit severe symptoms of hemophilia due to the presence of the normal allele, they can experience mild bleeding problems and have a 50% chance of passing the mutated allele to their offspring. Male children who inherit the mutated allele will be affected by hemophilia, while female children may become carriers themselves. Genetic counseling is recommended for carriers to understand the risks for future generations.
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.
