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What is the expected genotypic ratios for di-hybrid cross and mono-hybrid cross?

In a dihybrid cross, the expected genotypic ratio is 1:2:1 for homozygous dominant: heterozygous: homozygous recessive genotypes, respectively. In a monohybrid cross, the expected genotypic ratio is 1:2:1 for homozygous dominant: heterozygous: homozygous recessive genotypes, respectively.


If Tall is dominant over short a homozygous dominant man marries a homozygous recessive woman what of their children are expected to be short?

All of their children are expected to be heterozygous for the trait (Tt), which means they would be tall (dominant phenotype). The recessive trait for being short would only manifest if both copies of the gene were recessive.


If a homozygous dominant parent and a heterozygous parent are crossed what percentage of the offspring are expected to be homozygous dominant?

Rr


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.


Cautious optimism meaning?

Cautious Optimism refers to a balance between completely optimistic and being cautious in our approach. We cannot be completely optimistic on certain issues and we should have our backup plans ready, as a cautious step so that we may not loose on the situation. To summarize, Keep your back-up plans ready and be optimistic about the expected result. Varadarajan S Chennai, India


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 genotypic ratio for a tetrahybrid cross?

1:1:1:1:1:1:1:1 ratio is the expected outcome of a heterozygous (BbGgCc) and a homozygous recessive (bbggcc) cross.


How many of those offspring would you expect to have white?

1000


The offspring of two parents that are heterozygous for a given trait have a percent chance of being homozygous for that trait?

There is a 25% chance (1 in 4) that the offspring will be homozygous for the trait. This is because when both parents are heterozygous (Aa), they can pass on either the dominant allele (A) or the recessive allele (a) to their offspring, resulting in a 1 in 4 chance of the offspring receiving the recessive allele from both parents and becoming homozygous (aa) for that trait.


In guinea pigs black hair color is dominant B and white hair color is recessive b What hair color are the guinea pigs offspring?

To determine the hair color of the guinea pigs' offspring, we need to know the genotypes of the parents. If one parent is homozygous dominant (BB) and the other is homozygous recessive (bb), all offspring will be heterozygous (Bb) and will have black hair. If both parents are heterozygous (Bb), approximately 25% of the offspring are expected to be homozygous dominant (BB), 50% heterozygous (Bb), and 25% homozygous recessive (bb), resulting in a 75% chance of black hair and a 25% chance of white hair.


What is the expected phenotypic ratio resulting from a homozygous dominant?

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


What fraction of the children should be homozygous smooth?

To determine the fraction of children that should be homozygous smooth, we need to know the genetic information regarding the traits involved, specifically the alleles for smooth and rough phenotypes. If we assume that smooth is a dominant trait (S) and rough is recessive (s), we can use a Punnett square based on the parental genotypes. Without specific parental genotypes provided, it’s impossible to calculate the exact fraction; however, if both parents are heterozygous (Ss), then 1/4 of the offspring would be expected to be homozygous smooth (SS).