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What is the expected phenotypic ratio resulting from a homozygous dominant?
Wiki User
∙ 10y ago
I will use a simple example of Height......
T (tall) is dominant over t (short). So we have 2 ways to make a tall offspring: TT and Tt
't' is a recessive trait so it will take two 't's together to make a short offspring: tt
Homozygous dominant means it has 2 of the same allele, and that this allele is the dominant one. So T T
Heterozygous means it has 2 different alleles. So T t
A monohybrid cross simply means "find out how this gene is inherited by the offspring".
To answer the question we put the parents (TT and Tt) in a punnet square...
.....T.......T
T....TT...TT
t.....Tt....Tt
The phenotype (how they actually look) is tall for all 4 of them.
TT is tall and Tt is also tall (even though they have a short 't' allele, the tall 'T' allele is dominant, making them tall anyway.
Therefore the ratio of tall to short is 4:0 which can be reduced to 1:0
Wiki User
∙ 15y ago
Wiki User
∙ 13y agoThe expected phenotypic ratio will be 100% dominant. This is so because if we take AA to be the homozygous individual and Aa to be the heterozygous, the Punnett square will give us the offspring AA, AA, Aa, and Aa. They will all have one dominant allele, resulting in a dominant phenotype.
Wiki User
∙ 8y agoThe expected genotype ratio from a heterozygous x heterozygous cross is 1:2:1.
For example, in the cross Bb x Bb the genotype ration would be 1BB:2Bb:1bb
Wiki User
∙ 13y agoi believe it would be AA AA Aa Aa or all dominate traits showing, two homozygous dominate, two heterozygous dominate. I'm in college bio, but its been a lilwhile since we studdied this.
Wiki User
∙ 10y agoCrossing Aa with Aa would get you AA, Aa, Aa and aa. Two heterozygotes and two homozygotes. Of the latter, one dominant and one recessive.
Wiki User
∙ 10y agoA homozygous dominant cross?
AA X AA
Yields all AA
========
Wiki User
∙ 15y agothe ratios would be 9:3:3:1
Wiki User
∙ 11y ago1:1
Wiki User
∙ 12y ago1:0
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What is the expected genotypic ratio for a one factor cross of two hybrid organisms?
1 homozygous dominant: 2 heterozygous: 1 homozygous recessive
What happens to alleles between the p generation and F2 generation?
In the P generation, one parent is homozygous dominant and the other parent is homozygous recessive. In the F1 generation, the product of a cross between the P generation, the offspring are all heterozygous. In the F2 generation, the product of a cross between the F1 generation, the expected result is 1/4 homozygous dominant, 1/2 heterozygous, and 1/4 homozygous recessive.
Are phenotypic ratios are always the same as genotypic ratios?
Expected phenotypic ratios are always the same: 3:1. Expected genotypic ratios are always the same: 1:2:1.
If a homozygous dominant plant crossed with a homozygous recessive plant what is the genotype and phenotype of their offspring?
If two homozygous plants with contrasting traits are crossed, the expected genotypes for the offspring will be heterozygous. The dominant trait would be expressed, but they'd be carriers for the recessive trait.
What would mating between a true breeding purple flowered pea plant and a true breeding white flowered pea plant produce?
Make a Punnet Square:White HETEROZYGOUS---WwRed HOMOZYGOUS--ww (this one is recessive because the white characteristic dominated in the heterozygous type)So:W ww Ww www Ww wwThese four are the potential types of the offspring, they will either be HETEROZYGOUS WHITE or HOMOZYGOUS RED, no homozygous white
If Tall is dominant over short a homozygous dominant man marries a homozygous recessive woman what of their children are expected to be short?
50%
What is the expected genotypic ratio for a one factor cross of two hybrid organisms?
1 homozygous dominant: 2 heterozygous: 1 homozygous recessive
What is the expected genotype ratio for a one-factor cross of two hybrid organisms?
The phenotypic ratio of 2 hybrids would be 3:1 while the genotypic would be 1:2:1. ChaCha on!
What is the phenotypic ratio of a monohybrid cross?
In a monohybrid cross with one parent homozygous dominant and the other homozygous recessive The phenotype of the F1 offspring will be 100% that of the parent with the dominant allele. A cross of two of the F1 offspring will be 75% phenotypically like the dominant allele and 25% will be hommozygous recessive or 3 to 1
If a homozygous dominant parent and a heterozygous parent are crossed what percentage of the offspring are expected to be homozygous dominant?
Rr
The phenotypic ratio resulting from a dihybrid cross showing independent assortment is expected to be what?
The phenotypic ratio resulting from a dihybrid cross showing independent assortment is expected to be 9:3:3:1. This ratio is obtained when two heterozygous individuals are crossed for two traits that are independently inherited. The ratio represents the different combinations of phenotypes that can arise from the cross.
What happens to the alleles between the P generation and the F2 generation?
In the P generation, one parent is homozygous dominant and the other parent is homozygous recessive. In the F1 generation, the product of a cross between the P generation, the offspring are all heterozygous. In the F2 generation, the product of a cross between the F1 generation, the expected result is 1/4 homozygous dominant, 1/2 heterozygous, and 1/4 homozygous recessive.
What happens to alleles between the p generation and F2 generation?
In the P generation, one parent is homozygous dominant and the other parent is homozygous recessive. In the F1 generation, the product of a cross between the P generation, the offspring are all heterozygous. In the F2 generation, the product of a cross between the F1 generation, the expected result is 1/4 homozygous dominant, 1/2 heterozygous, and 1/4 homozygous recessive.
Are phenotypic ratios are always the same as genotypic ratios?
Expected phenotypic ratios are always the same: 3:1. Expected genotypic ratios are always the same: 1:2:1.
What would you expect if you breed or Mate two different true breeding stocks of plants?
If one trait is dominant over the other, then the resulting F1 generation would be expected to have the heterozygous genotype and dominant phenotype.
Why does the expected genotypic ratio often differ from the expected phenotypic ratio from monohybrid cross?
Because in heterozygotes, both alleles are transcribed and translated.
If a homozygous dominant plant crossed with a homozygous recessive plant what is the genotype and phenotype of their offspring?
If two homozygous plants with contrasting traits are crossed, the expected genotypes for the offspring will be heterozygous. The dominant trait would be expressed, but they'd be carriers for the recessive trait.
