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What are genotype and phenotype ratios for the dihybrid cross AaBB X AaBb?
Wiki User
∙ 11y ago
The genotypes of this cross are:
- AA - 25%
- Aa - 50%
- aa - 25%
The phenotypes of this cross are:
- Dominant trait (A) - 75%
- Recessive trait (a) - 25%
- A ratio of dominant to recessive phenotypes - 3:1
Wiki User
∙ 14y ago
Wiki User
∙ 12y agoWell, if you use a punnent square, all you would have to do is put Aa on the top and AA on the bottom.
A a
a Aa AA
a Aa AA
So as you can see there is a 50 % chance the off spring will be Aa and a 50% chance the off spring will be AA.
Wiki User
∙ 11y agoGamete possibilities from parent 1. aB AB
Gamete possibilities from parent 2. AB Ab aB ab
Genotypes AaBB AaBb aaBB AaBb AABB AABb AaBB AaBb
Ratio: 1 AABb 2 AaBb 1 AABB 1AABb 1AaBB 1aaBB 1aaBb
Phenotype: Since there is no information on what A or B represent
6 dominant appearance for both traits
2 recessive for trait A and dominant for trait B
Wiki User
∙ 14y agoGenotype: AA AA Aa Aa 50% Homodominate 50%Hetro
Phenotype: 100% Dominate charicteristics
Wiki User
∙ 9y agoThe phenotypic ratio for the cross AaBb and AaBb is 1/4 AaAa, 1/2 AaBb, and 1/4 BbBb. This can be determined by using a Punnett Square.
Wiki User
∙ 13y agoAA:Aa:aa in the ratio of 1:2:1 in that order
Wiki User
∙ 13y ago1:2:1
Anonymous
100%
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What is the expected genotypic ratios for di-hybrid cross and mono-hybrid cross?
The expected genotypic ratios for a dihybrid cross is 9:3:3:1, and for a monohybrid cross is 1:2:1.
A scientist is preparing a punnett square for a dihybrid cross of a plant with a genotype of GGKk. What possible gametes can the plant produce?
Gk, gk
To perform a testcross scientists cross an organism with an unknown genotype with a organism.?
If an individual is of the dominant phenotype, its genotype can be either AA or Aa (letter A picked for demonstration's sake). To do a good test cross, we have to be able to unambiguously tell which one of the genotypes the individual is. The best test cross would be conducted with a homozygous recessive (aa) individual. This way, if the cross generates 100% dominant phenotype, then the original individual was homozygous dominant. If the cross generates 50% dominant and 50% recessive phenotype, then the original individual was heterozygous.
What is a testcross?
Gregor Mendel devised the fundamental tool of the test cross. It is an experimental cross of an individual organism of dominant phenotype but unknown genotype and an organism with a homozygous recessive genotype .
To determine the genotype of an individual that shows the dominant phenotype you would cross that individual with one that is?
To determine the genotype of an individual that shows the dominant phenotype you would cross that individual with one that is homozygous recessive. A monohybrid cross of two individuals that are heterozygous for a trait exhibiting complete dominance would probably result in a phenotype ratio is 3 dominant 1 recessive.
What is the phenotype of a dihybrid cross?
The phenotypic rationof a dihybrid cross is 9:3:3:1
In a dihybrid cross between individual with the genotype RRYYand an individual with the genotype rryy all of the offspring with have the genotype?
RrYy
What is the expected genotypic ratios for di-hybrid cross and mono-hybrid cross?
The expected genotypic ratios for a dihybrid cross is 9:3:3:1, and for a monohybrid cross is 1:2:1.
How can the unknown genotype of an individual with a dominate phenotype be determined?
A test cross.
What kind of phenotype ratio would you expect from a mono-hybrid cross?
possible mendelian ratios for monohybrid cross genotype is 1:2:1 and phenotype is 3:1
How do you identify the genotype?
normal sexual cross pollination - each parent plant contributes traits from its genotype (which are expressed as the phenotype)
Is a Monohybrid Cross the same as a punnet square if not what's the difference?
A punnett square is the diagram used to determine the expected genotypic ratios for the offspring.A dihybrid cross is a cross involving two different traits. For example RrDd X RrDd would be a dihybrid cross. You could use a punnett square to determine the expected ratios for this cross:RDRdrDrdRDRRDDRRDdRrDDRrDdRdRRDdRRddRrDdRrddrDRrDDRrDdrrDDrrDdrdRrDdRrddrrDdrrddOne parent's genotype is shown across the top, the other down the side (both in bold).
A scientist is preparing a punnett square for a dihybrid cross of a plant with a genotype of GGKk. What possible gametes can the plant produce?
Gk, gk
What would be the phenotype ratio and genotype ratio in the offesprings in the f2 generation?
For monohybrid cross the genotype ratio in f2 generation would be 1:2:1 and phenotype ratio would be 3: 1
To perform a testcross scientists cross an organism with an unknown genotype with a organism.?
If an individual is of the dominant phenotype, its genotype can be either AA or Aa (letter A picked for demonstration's sake). To do a good test cross, we have to be able to unambiguously tell which one of the genotypes the individual is. The best test cross would be conducted with a homozygous recessive (aa) individual. This way, if the cross generates 100% dominant phenotype, then the original individual was homozygous dominant. If the cross generates 50% dominant and 50% recessive phenotype, then the original individual was heterozygous.
The unknown genotype of an individual with a dominant phenotype can be determined using?
This question is worded weird, because if someone had a dominant phenotype, as in Brown eyes dominant, than they would be BB or Bb. The exact genotype would need to have a key to what one of their parents' genotype was. Example: If a man with brown eyes (dominant) had a mom with blue eyes (recessive) then what would the man's genotype be? the answer would be Bb because that means that the man's dad would have BB and mom would be bb and when using punnent square, his genotype is Bb (only possible genotype is Bb)
How can a test cross reveal the genotype of a parent whose phenotype is dominant?
Try using a Punnett Square.
