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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
Can a single recessive gene can determine the nature of a trait?
Yes, a single recessive gene can determine the nature of a trait if it is expressed and not masked by a dominant gene. In cases where the individual inherits two copies of the recessive gene, the trait will be expressed.
What is another name for heterozygous?
Another way to express something is heterozygous is to say it has dual alleles. There is a dominant and recessive allele. Alleles determine which traits something will have. Normally this is expressed in a single allele.
What condition is caused by a dominant allele of a single gene?
Dominant Alleles with negative effects tend to die out rather quickly through natural selection. Some examples are polydactyl, Huntington's disease, and sialuria. There may be some others, but they are rare. Often they were found in aristocrat families.
What genes appear when genes are dominant?
When a gene is dominant, its effect will be expressed when present in the genotype, overshadowing the influence of the recessive allele. The dominant gene codes for a specific trait or characteristic that will be visible in the individual's phenotype, even if only one copy of the dominant allele is present in the genetic makeup.
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
Which statement best describes a dominate allele?
okay well the dominant form of an allele, is YO MOM she is the answer to all your problems and yea te va pegar con la mexican chancla
Can a single recessive gene can determine the nature of a trait?
Yes, a single recessive gene can determine the nature of a trait if it is expressed and not masked by a dominant gene. In cases where the individual inherits two copies of the recessive gene, the trait will be expressed.
Comapre and contrast dominant and recessive traits?
Dominant traits are characterized by a single copy of a gene being sufficient to express a certain trait, whereas recessive traits require two copies of the gene (one from each parent) for the trait to be observed. Dominant traits typically mask the expression of recessive traits when both are present.
How are dominant and recessive traits represented?
Autosomal recessive alleles ( both males and females) and X-linked alleles in females always express themselves in homozygous condition. On other hand, X -chromosome linked recessive allele express singly in males.
What are dominant alleles?
Dominant alleles are genetic variants that are expressed when present in a single copy in an individual's genotype, masking the expression of a recessive allele. In a heterozygous individual (having two different alleles for a gene), the dominant allele will determine the phenotype. Dominant alleles are represented by a capital letter in genetic notation (e.g., A).
Why is an organism genotype may be homozygous dominant homozygous recessive or heterozygous but never heterozygous recessive?
I take it you're referring to the phenotype. Say a trait, like flower colour, is influenced by a single gene. The plant will possess two copies of the gene, one from each parent, but only one colour is expressed. Let's say that red is dominant and white is recessive. A plant containing 2 red alleles (homozygous for the dominant allele) will be red. A plant containing 2 copies of the white allele (Homozygous recessive) will be white and heterozygous plant, containing a single copy of both alleles will be red. There is no heterozygous recessive because the dominant allele will determine the phenotype.
A single gene trait that has two alleles and that shows a simple dominant recessive pattern will result in?
A 3:1 phenotypic ratio (Mendelian inheritance).
If a allele is masked is it recessive?
If an allele is masked, it is most likely recessive, but not necessarily. This is due to epistasis, the interaction between two or more genes to control a single phenotype. For example, "K" codes for more keratin pigment in the skin, but "k" does not. One can still be albino, however, for if they get the dominant "A" allele, this allelle will override and mask the dominant "K" pigment in the skin, making the person albino.
What is another name for heterozygous?
Another way to express something is heterozygous is to say it has dual alleles. There is a dominant and recessive allele. Alleles determine which traits something will have. Normally this is expressed in a single allele.
What condition is caused by a dominant allele of a single gene?
Dominant Alleles with negative effects tend to die out rather quickly through natural selection. Some examples are polydactyl, Huntington's disease, and sialuria. There may be some others, but they are rare. Often they were found in aristocrat families.
What is the difference between recessive disorders and dominant disorders?
A sex linked dominant trait could be on the X chromosome of either parent and the phenotype of any individual carrier would be that of the dominant trait. A father with the dominant characteristic on his single X chromosome would produce daughters that are 100% carriers and would not pass the characteristic on to his sons. A mother who is a dominant X linked carrier would pass the dominant characteristic on to half hersons and half her daughters all of which would show the trait phenotypically. A sex linked recessive father would produce 100% carrier daughters. His sons would not get the recessive allele from him. A sex linked recessive carrier (heterozygous) mother would pass the trait on to 50% of her children and 50% of her sons would show the recessive trait genetics.
