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Recessive alleles are expressed if there is no dominant allele (of the same gene) present. This can be for two reasons, because the other allele is also recessive, or because there is no other allele (such as X-linked genes, which males only have one copy of).
Dominant genes are shown for example as T recessive genes are shown as t if there is a dominant and recessive gene (Tt) then your child will get the dominant one this is called heterozygous. Meaning that they have two different genes for a trait such as curly hair and straight hair. There is also being homozygous (TT or tt) the only way your child could recieve a recessive gene such as left handednes, is if the two parents were carrying a recessive gene along with their dominant one or if they both were carrying two reccesive genes. the childs probable genotype can be explaind a lot better with a Punnet Square. I hope this wasn't too confusing.:-)
Alleles affect traits like eye color. Alleles for brown and blue eyes are dominant and recessive respectively. Individuals who have homozygous and heterozygous genotypes with the dominant allele will have brown eyes. However individuals are homozygous for the recessive allele will have blue eyes.
Each person has two alleles for their blood type, one dominant and one recessive. Except for type AB blood where the alleles are co-dominant. The allele for O blood is always recessive when paired with either an A or B allele.
It depends on the gene in question, and the type of dominance of the trait.For monogenetic traits (those controlled by a single gene), the dominant trait(s) will be expressed when two different alleles are present.For example, if B leads to black fur and b leads to white fur:Complete dominance would result in a rabbit with Bb having black fur.Incomplete dominance - Bb would result in grey furCodominance - Bb would result in black and white patches/spots/etc.
It is neither recessive nor dominant because it is a chromosomal disorder and not just a problem present in a single gene.
no, because dominant is different from recessive, its impossible to have a dominant-recessive trait because the dominant is when only one copy of the gene is present, while in the recessive a trait that must be contributed by both parents in order to appear in the offspring, in short the dominant is for single parent, while in the recessive is a product of two parents.
A 3:1 phenotypic ratio (Mendelian inheritance).
homozygous dominant, heterozygous, or homozygous recessive
Homozygous.
heterozygous
A heterozygous is a hybrid of genes. It has a dominant and recessive gene. The dominant gene covers over the recessive trait, making the individual have the dominant trait. (trait are alleles...) or apex ans:two
It is neither recessive nor dominant because it is a chromosomal disorder and not just a problem present in a single gene.
dominant and others may be recessive.
You are supposed to have 2 alleles in a single nucleus and if not there can be a disorder i believe.
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.
Recessive alleles are expressed if there is no dominant allele (of the same gene) present. This can be for two reasons, because the other allele is also recessive, or because there is no other allele (such as X-linked genes, which males only have one copy of).