dominant/recessive

Genetics as it applies to evolution, molecular biology, and medical aspects.

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kabuto
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dominant/recessive

Post by kabuto » Thu Apr 27, 2006 2:17 pm

how are alleles recessive or dominant?

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opuntia
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Post by opuntia » Thu Apr 27, 2006 4:59 pm

When a gene is phenotypically expressed in the homozygous state but has its expression masked in the presence of a dominant gene, it becomes the recessive one while a dominant allele is an allele of a gene that, when present in an organism's genotype dictates the phenotype of the organism regardless of the other alternative forms of the same gene that are present in the organism.
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kabuto
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Post by kabuto » Fri Apr 28, 2006 8:16 am

opuntia wrote:When a gene is phenotypically expressed in the homozygous state but has its expression masked in the presence of a dominant gene, it becomes the recessive one while a dominant allele is an allele of a gene that, when present in an organism's genotype dictates the phenotype of the organism regardless of the other alternative forms of the same gene that are present in the organism.


yes, but why are they masked/expressed :?:

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