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Q: What fraction of the offspring resulting from a heterozygous by heterozygous dihybrid cross are homozygous recessive for both traits?
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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.

A parent that is homozygous for a dominant trait is crossed with a parent that is homozygous for the recessive trait What percentage of the offspring will display the dominant trait?

100% of the offspring will display the dominant trait because the homozygous dominant parent can only pass on the dominant allele. The offspring will inherit one dominant allele from the dominant parent and one recessive allele from the recessive parent, resulting in a heterozygous genotype expressing the dominant trait.

The probability of a homozygous recessive offspring resulting from a cross between two homozygous dominant individual is?

It depends on the parents. The parent could have two dominant genes which would give a 0% chance of the offspring being recessive. The only way that the offspring could have a recessive characteristic is if the both parents have one dominant and one recessive gene, a 25% chance. The chance that both parents would pass on the recessive gene (if they have one dominant and recessive gene) is also 25%, because there is a 50% chance for each parent.

What will be the ratio produced if Tt is crossed with tt?

The ratio produced would be 1:1 for heterozygous (Tt) offspring to homozygous recessive (tt) offspring. This is because the parent with genotype Tt will pass on one dominant allele (T) and one recessive allele (t) to its offspring, resulting in a 50% chance of either genotype in the offspring.

Why were heterozygous individuals called carriers for non-sex-linked and x-linked recessive patterns of inheritance?

I don't know and don't care

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

Can a white tiger and a normal bangel tiger mate if so what color is there cub?

Heterozygous - White gene carrier Homozygous - No white gene White tigers are not albinos and do not constitute a separate subspecies of their own and can breed with orange ones, although all of the resulting offspring will be heterozygous for the recessive white gene, and their fur will be orange. The only exception would be if the orange parent was itself already a heterozygous tiger, which would give each cub a 50% chance of being either double-recessive white or heterozygous orange. If two heterozygous tigers, or heterozygotes, breed on average 25% of their offspring will be white, 50% will be heterozygous orange (white gene carriers) and 25% will be homozygous orange, with no white genes. In the 1970s a pair of heterozygous orange tigers named Sashi and Ravi produced 13 cubs in Alipore Zoo, of which 3 were white. If two white tigers breed, 100% of their cubs will be homozygous white tigers. A tiger which is homozygous for the white gene may also be heterozygous or homozygous for many different genes. The question of whether a tiger is heterozygous (a heterozygote) or homozygous (a homozygote) depends on the context of which gene is being discussed. Inbreeding promotes homozygosity and has been used as a strategy to produce white tigers. (From Wikipedia)

What will be the resulting phenotype of two alleles one being dominant to the other recessive allele?

The phenotypic ration in F1 generation will be 3 : 1. Three individuals showing dominant trait and one individual with recessive trait. However, the genotypic ratio will be 1:2:1.That is one homozygous dominant, two heterozygous dominant and one homozygous recessive individuals.

What happens when a dominant and recessive allele are both present?

The resulting offspring will have the dominant trait. It depends on if the dominant is hetero or homo...if it was homozygous then your offspring will have a hetozygous trait showing the dominant trait (to clear this up if you are confused lets say we are talking about brown eyes(BB-dominant) vs blue eyes(bb-recessive)--a homozygous would give you a brown eyed child with Bb and but if the person is heterozygous Bb and gets with a recessive you have a chance of getting Bb or bb giving you a possibility of a brown or blue eyed child) i just made that way more confusing than it had to be

When two pea plants that are heterozygous for yellow peas are crossed.the resulting offspring have a genotypic ratio of?

Because heterozygous means that the parents contain both dominant and recessive genes the offspring will be 75% tall and 25% short. If you were to draw the punnett squares you would see that there are 3 possible children one with only dominant tall traits two with both dominant and recessive traits and one with only recessive traits.

In humans straight toes S is dominant over curled toes s What would be the result of a cross between a recessive male and a heterozygous female?

The resulting offspring will have 50% chance of having straight toes and being heterozygous, and 50% chance of having curled toes and being recessive.

The heterozygous of red and white flower color which was co-dominant would be?

If red color is dominant, (RR) and white is recessive, (rr) then crossing a homozygous red plant with a homozygous white plant will produce 100% red offspring. This is the F1 generation. These F1 offspring will be 100% heterozygous (Rr). Subsequent crosses of these offspring in the second generation (F2) will produce 75% red and 25% white offspring phenotypically (the visual appearance of the color, The genotype ratio will 1 RR: 2 Rr:1rr with percentages of 25% homozygous red 50% heterozygous red and 25% homozygous white.