Question

In: Biology

homozygous recessive is crossed with a heterozygote, what percent chance is there of getting a heterozygous...

homozygous recessive is crossed with a heterozygote, what percent chance is there of getting a heterozygous genotype in f1?

Solutions

Expert Solution

We can use the following Punnett square to do the crossing and get the results. Let aa is the recessive homozygote and Aa is heterozygote.

                               l    a   l   a   l

                             A l Aa l Aa l

                             a l aa l aa l

Now, we see that of the above four offsprings of generation F1, two are heterozygous. Therefore, percent chance of getting a heterozygote in this cross is 50%.

Thanks!

gladiator answered 1 year ago
Next > < Previous

Related Solutions

Drosophila females heterozygous for three recessive mutations, a, b, and c were crossed to males homozygous...
Drosophila females heterozygous for three recessive mutations, a, b, and c were crossed to males homozygous for all three mutations. The cross yielded the following results. Phenotype Number A B C - 75 A B c - 348 A b c - 96 a B C - 110 a b C - 306 a b c - 65 Determine the gene order. Determine the distance between genes . Make a genetic map of the genes.
Define the following terms: Homozygous, heterozygous, dominant, recessive, incomplete dominance.
Define the following terms: Homozygous, heterozygous, dominant, recessive, incomplete dominance.  
A Drosophila female homozygous mutant for two recessive genes (a and b) is crossed to a...
A Drosophila female homozygous mutant for two recessive genes (a and b) is crossed to a wild-type male. The F1 are all wild-type. An F1 female is crossed to a double-mutant male and the following phenotypes were seen in the F2: a b 497 + + 460 a + 465 + b 426 Total 1848 Perform a “best fit” or apriori χ2 analysis to determine if genes a and b assort independently. Give the value for χ2, DF and Probability;...
Two pea plants are crossed. One is homozygous for white flowers and the other is heterozygous...
Two pea plants are crossed. One is homozygous for white flowers and the other is heterozygous for purple flowers. Both are heterozygous for being tall plants. In pea plants, tall is dominant to short, and purple flowers are dominant to white. Fill out the table below for the probability of each possible phenotype. Report probability as a decimal rounded to four places (e.g. 0.1250, not 1/8 or 12.5%). Phenotype Probability tall purple __________ short purple __________ tall white __________ short...
Two pea plants are crossed. One is homozygous for white flowers and the other is heterozygous...
Two pea plants are crossed. One is homozygous for white flowers and the other is heterozygous for purple flowers. Both are heterozygous for being tall plants. In pea plants, tall is dominant to short, and purple flowers are dominant to white. Fill out the table below for the probability of each possible phenotype. Report probability as a decimal rounded to four places (e.g. 0.1250, not 1/8 or 12.5%). Phenotype Probability tall purple short purple tall white short white In a...
In tomatoes, a heterozygous plant with normal fruit and purple stems is crossed with a recessive...
In tomatoes, a heterozygous plant with normal fruit and purple stems is crossed with a recessive plant having fasciated fruit and green stems. The following distribution of offspring is observed: normal fruit, purple stems 38.5%  fasciated fruit, green stems 38.5% normal fruit, green stems 11.5%   fasciated fruit, purple stems 11.5% What conclusion can be made regarding the loci for fruit shape and stem color? HINT determine the RF What the loci and RF here mean? How to answer this question?
If homozygous green seed-producing plant is crossed to a homozygous yellow seed-producing plant, what percent of...
If homozygous green seed-producing plant is crossed to a homozygous yellow seed-producing plant, what percent of offspring produces yellow seeds? A) 10 B) 50 C) 33 D) 100 E) 25
Two pea plants are crossed. Both are heterozygous for purple blossom color, while one is homozygous...
Two pea plants are crossed. Both are heterozygous for purple blossom color, while one is homozygous for being short and the other is heterozygous for being tall. In pea plants, tall is dominant to short, and purple flowers are dominant to white. Fill out the table below for the probability of each possible phenotype. Report probability as a decimal rounded to four places (e.g. 0.1250, not 1/8 or 12.5%). Phenotype Probability tall purple short purple tall white short white In...
Two pea plants are crossed. Both are heterozygous for purple blossom color, while one is homozygous...
Two pea plants are crossed. Both are heterozygous for purple blossom color, while one is homozygous for being short and the other is heterozygous for being tall. In pea plants, tall is dominant to short, and purple flowers are dominant to white. Fill out the table below for the probability of each possible phenotype. Report probability as a decimal rounded to four places (e.g. 0.1250, not 1/8 or 12.5%). Phenotype Probability tall purple short purple tall white short white In...
What is the difference between heterozygous and homozygous individuals?
Part A What is the difference between heterozygous and homozygous individuals? Homozygotes have one chromosome while heterozygotes have two similar chromosomes. The homozygote will express the dominant trait and the heterozygote will express the recessive trait. All of the gametes from a homozygote carry the same version of the gene while those of a heterozygote will differ. Heterozygotes carry two copies of a gene while homozygotes only carry one. Part B When constructing a Punnett square, the symbols on the...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT