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Albinism is a recessive trait in humans that is controlled by a single gene how many recessive alleles must a person have to have albinism?
2
What else can I help you with?
The photo below shows an albino offspring from a non-albino mother. If albinism is a recessive trait, what are the possible genotypes of the mother, the father, and the offspring?
For the mother to have a non-albino offspring, she would need to have at least one dominant allele for the trait, so her genotype could be either Aa or AA. The father must have two recessive alleles (aa) to pass on albinism to the offspring. The albino offspring's genotype would be aa.
Are smile dimples controlled by a recessive allele?
Nope, the alleles for smile dimples are actually dominant, not recessive.
When is the only time a recessive phenotype can be observed?
A recessive phenotype can only be observed when an individual is homozygous recessive for that trait, meaning they have two copies of the recessive allele. This is because in a heterozygous individual, the dominant allele will mask the expression of the recessive allele.
Which alleles is the recessive alleles?
Recessive alleles are alleles that are masked or overshadowed by dominant alleles. In a heterozygous genotype, the recessive allele does not show its effects. Only in a homozygous recessive genotype does the recessive allele manifest its trait.
What combination of alleles could produce a trait controlled by a dominant allele?
genotype
How many recessive alleles must a person have to have albinism?
2
What is a condition that is shown only when two recessive alleles are present?
Recessive trait...
Why does albinism exist?
I think albinism still exists I have heard of some cases about it. Albinism is an inherited condition that is present at birth. Read more at: http://www.answers.com/topic/albinism == Albinism results from the inheritance of recessive alleles. The condition is known to affect mammals (including humans), fish, birds, reptiles and amphibians. The principal gene which results in albinism prevents the body from making the usual amounts of the pigment melanin. Most forms of albinism are the result of the biological inheritance of genetically recessive genes that are passed on from both parents, although some rare forms are inherited from only one parent.
How many recessives alleles must a person have to have albinism?
2
What is a person whose skin has no pigment?
Albinism is the congenital absence of melanin in the dermis. Albinism is an inherited condition resulting from the combination of recessive alleles passed from both parents of an individual.This condition is known to affect mammals, fish, birds, reptiles, and amphibians.
If Laurie has albinism but neither of her parents exhibits this inherited condition the trait must be?
Recessive. This trait can skip generations, because it requires two recessive alleles (ex. aa vs Aa), and can be present in heterogeneous alleles (Aa) without showing a recessive phenotype.
How do you make albinism?
First off, you don't make it - it's actually a congenital disorder due to a lack of melanin pigment in the eyes, skin and hair. Most forms of albinism are the result of the biological inheritance of genetically recessive alleles (genes) passed from both parents of an individual, though some rare forms are inherited from only one parent. There are other genetic mutations which are proven to be associated with albinism.
What combinations of alleles could produce a trait controlled by a recessive alleles?
recessive + recessive or tt
What chromosome is Albinism located on?
Chromosome 9.
Can you speard albimism by toucking someone if you have it?
No.Most forms of albinism are the result of the biological inheritance of genetically recessive alleles (genes) passed from both parents of an individual, though some rare forms are inherited from only one parent. There are other genetic mutations which are proven to be associated with albinism. All alterations, however, lead to changes in melanin production in the body.The chance of offspring with albinism resulting from the pairing of an organism with albinism and one without albinism is low. However, because organisms can be carriers of genes for albinism without exhibiting any traits, albinistic offspring can be produced by two non-albinistic parents. Albinism usually occurs with equal frequency in both genders. An exception to this is ocular albinism, which it is passed on to offspring through X-linked inheritance. Thus, ocular albinism occurs more frequently in males as they have a single X and Y chromosome, unlike females, whose genetics are characterized by two X chromosomes.There are two different forms of albinism; a partial lack of the melanin is known as hypomelanism, or hypomelanosis and the total absence of melanin is known as amelanism or amelanosis.(Source wikipedia)
What combination of alleles could produce a trait controlled by a recessive allele?
recessive + recessive or tt
The photo below shows an albino offspring from a non-albino mother. If albinism is a recessive trait, what are the possible genotypes of the mother, the father, and the offspring?
For the mother to have a non-albino offspring, she would need to have at least one dominant allele for the trait, so her genotype could be either Aa or AA. The father must have two recessive alleles (aa) to pass on albinism to the offspring. The albino offspring's genotype would be aa.
