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Recessive in Biological Definition

Albinism

... condition arising from the combination of recessive genes passed from both parents of an individual. ... condition, but will become a carrier of the recessive gene . Where two carriers of the recessive gene have a child together, that child will have ...

Heterozygote

... copy of the gene; this would be referred to as a recessive disease. To describe how a trait inherits ( ... trait is indicated with a capital and the recessive with a lower case character. The colour of ... homozygote pink flower and pp for the recessive homozygote white flower. When these are crossed, ...

Mendelian inheritance

... in a 3:1 ratio (Fig. 1) between dominant and recessive phenotypes , his experiments with two traits ... 1 and 2). Figure 1 : Dominant and recessive phenotypes. (1) Parental generation. (2) F 1 generation. (3) F 2 generation. Dominant ( red ) and recessive (white) phenotype look alike in the F 1 (first) ...

Allele

... flower (with one red and one white allele), the petals will be red. The recessive allele will only be expressed in a recessive homozygote. However, there are exceptions to the way heterozygotes ...

Homozygote

... comprises two alleles for the dominant trait (e.g. AA ). A homozygous recessive genotype occurs when a particular locus comprises two alleles for the recessive trait (e.g. aa ). See also: heterozygote . ...

Blood type

... test as type O may have the Bombay phenotype : they have inherited two recessive alleles of the H gene, (their blood group is O h and their genotype is ... become the B antigen. It is the same for the A allele. However, if only recessive alleles for the H antigen are inherited (hh), as in the case above, the H ...

Gene

... results in terms of inherited characteristics. Mendel was also the first to hypothesize independent assortment, the distinction between dominant and recessive traits, the distinction between a heterozygote and homozygote, and the difference between what would later be described as genotype and phenotype. ...

Hardy-Weinberg principle

... q for the heterogametic sex but p^2, 2pq and q^2 for the homogametic sex. For example in humans red-green colourblindness is caused by an X-linked recessive allele. The frequency in males is about 1 in 12, (or 0.083) whereas it affects about 1 in 250 women (0.004). If a population is brought together ...

Human

... chromosomes XX and males have XY. The X chromosome is longer and carries many genes not on the Y chromosome, which means that defects of X-linked recessive genes affect men more often than women. For example, genes that control the clotting of blood reside on the X chromosome. Women have a ...

Neurospora crassa

... for its use as a model organism in science because it is easy to grow and has a haploid life cycle that makes genetic analysis simple since recessive traits will show up in the offspring. Neurospora was used by Edward Tatum and George Wells Beadle in their experiments for which they won the ...

X chromosome

... they inherit their father's X chromosome, and their sons have a 50% chance of inheriting that X chromosome. Diseases well known for their X-linked recessive inheritance are hemophilia (types A and B), and color blindness . There are few examples of X-linked dominant diseases; the best known in this ...
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