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The phenotypic ratio expected from a monohybrid cross between heterozygotes is 3:1 (assuming complete dominance), with the genotypic ratio being 1:2:1.
So, using tall = T, short = t and R = red, r = white as an example.
A monohybrid cross of Tt X Tt would be expected to produce 3 tall plants and 1 short plant (phenotypic ratio 3:1), which would be 1 TT, 2 Tt and 1 tt (genotypic ratio 1:2:1).
A dihybrid cross of heterozygotes is expected to produce a phenotypic ratio of 9:3:3:1.
So the cross of TtRr X TtRr would be epected to have:
9 tall red, 3 tall white, 3 short red and 1 short white (phenotypic ratio)
This is because each parent has 4 possible combinations of gametes (TR, Tr, tR and tr). There are therefore 16 combinations of gametes, providing a 9:3:3:1 phenotypic ratio.
Both of these are probably best visualised using a punnett square (see link below).
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A 9331 phenotypic ratio is characteristic of what?
independent assortment
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The Young and the Restless - 1973 1-9331 was released on: USA: 8 February 2010
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Days of Our Lives - 1965 1-9331 was released on: USA: 19 June 2002
What is 9.331 as a fraction in lowest terms?
9331/1000
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The phone number of the Bayliss Public Library is: 906-632-9331.
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The phone number of the Hector Maclean Public Library is: 910-628-9331.
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The phone number of the Jim Gatchell Museum Of The West is: 307-684-9331.
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The phone number of the Flatiron Building Heritage Center is: 724-785-9331.
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The phone number of the Helen Kate Furness Fr Library is: 610-566-9331.
Where did the ratio 9331 come from include what each of these four numbers mean?
The 9/3/3/1 ration is the ratio of phenotypes that are the result of a dihybrid cross. Consider two genes, A and B, that reside on different chromosomes (so that they independently assort). Assume each gene has two alleles. For A, A is dominant and a is recessive, while for the B gene, B is dominant and b is recessive. Now consider a cross between two individuals that are heterozygous for both genes (this is called a dihybrid cross): AaBb X AaBb There are only 4 possible gametes that each individual can produce (in equal proportion): AB Ab aB ab So if we cross the two we get 16 combinations. This will result in 9 possible genotypes: AABB AABb AAbb AaBB AaBb Aabb aaBB aaBb aabb However, there are only 4 possible phenotypes (with proportion in parentheses): Dominant A and B (9/16) (AABB, AABb, AaBB, AaBb) Dominant A, Recessive B (3/16) (AAbb, Aabb) Recessive A, Dominant B (3/16) (aaBB, aaBb) Recessive A, Recessive B (1/16) (aabb)
Where is the Eagleswood Historical Society in West Creek New Jersey located?
The address of the Eagleswood Historical Society is: 243 Main Street, West Creek, NJ 08092-9331
