**Genetics: Understanding Dihybrid Crosses****Part 3. Dihybrid Crosses**Now that you can easily perform a Punnett square for a monohybrid cross, let’s go on to dihybrid crosses. A dihybrid cross examines two characteristics instead of one. For example, we can look at the cross between a parent with red skin and sweet taste with a parent with white skin and bitter taste. The trick is to ensure you list every possible combination of alleles each parent can donate.There are several ways to determine these combinations. One method is to “foil it out” (as you would in algebra). Given the information below, try to work it out:- **Onion skin color** is denoted by the letter “R” with red (R) being dominant and white (r) being recessive.- **Taste** is denoted by the letter “B”; sweet (B) is dominant and bitter (b) is recessive.If one parent is heterozygous for skin color (red) and heterozygous dominant for taste (sweet), the onion genotype would be RrBb.To determine the four possible combinations of alleles the parent onion could donate, you can use the FOIL method (First, Outside, Inside, Last):Diagram illustrating FOIL method:- Shows “RrBb” with lines connecting the letters: - First: R and B - Last: r and b - Outside: R and b - Inside: r and B**9. Possible Combinations:**List the four possible combinations of alleles this onion could contribute:- [ R B ]- [ R b ]- [ r B ]- [ r b ]**10. Shared Combinations:**If the other parent was also heterozygous for both traits, they would have the same four possible combinations of alleles.List them below:- [ R B ]- [ R b ]- [ r B ]- [ r b ]

Name: **Genetics: Understanding Dihybrid Crosses****Part 3. Dihybrid Crosse
Uploaded: 2024-03-20T06:43:04.000Z
Channel: Bartleby
Description: **Genetics: Understanding Dihybrid Crosses****Part 3. Dihybrid Crosses**Now that you can easily perform a Punnett square for a monohybrid cross, let’s go on to dihybrid crosses. A dihybrid cross examines two characteristics instead of one. For examp

Answered: Image /qna-images/answer/f7b256aa-e3e1-455e-9e16-db83d2df7380.jpg

Science

Biology

9. List the four possible combinations of alleles this onion could contribute: 10. If the other parent was also heterozygous for both traits they would have the same four possible combinations of alleles. List them below:

9. List the four possible combinations of alleles this onion could contribute: 10. If the other parent was also heterozygous for both traits they would have the same four possible combinations of alleles. List them below:

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter8: Patterns Of Inheritance

Section: Chapter Questions

Problem 2ACQ: Figure 8.10 In pea plants, purple flowers (P) are dominant to white (p), and yellow peas (Y) are...

See similar textbooks

Similar questions

Figure 12.16 In pea plants, purple flowers (P) are dominant to white flowers (p) and yellow peas (Y) are dominant to green peas (y). What are the possible genotypes and phenotypes for a cross between PpYY and ppYy pea plants? How many squares do you need to do a Punnett square analysis of this cross?
Figure 12.12 What ratio of offspring would result from a cross between a white-eyed male and a female that is heterozygous for red eye color?
Figure 13.4 Which of the following statements is true? Recombination of the body color and red/ cinnabar eye alleles will occur more frequently than recombination of the alleles for wing length and aristae length. Recombination of the body color and aristae length alleles will occur more frequently than recombination of red/brown eye alleles and the aristae length alleles. Recombination of the gray/black body color and long/short aristae alleles will not occur. Recombination of the red/brown eye and long/short aristae alleles will occur more frequently than recombination of the alleles for wing length and body color.
The ABO blood system has been used to settle cases of disputed paternity. Suppose, as a geneticist, you must testify during a case in which the mother has type A blood, the child has type O blood, and the alleged father has type B blood. How would you respond to the following statements? a. Mans attorney: The mother has type A blood, so the childs type O blood must have come from the father. Because my client has type B blood, he could not be the father. b. Mothers attorney: Further tests prove this man is heterozygous, so he must be the father.
Mendel performs a cross using a true-breeding pea plant with round, yellow seeds and a true- breeding pea plant with green, wrinkled seeds. What is the probability that offspring will have green, round seeds? Calculate the probability for the F1 and F2 generations.
Figure 13.3 In a test cross for two characteristics such as the one shown here, can the predicted frequency of recombinant offspring be 60 percent? Why or why not?
Figure 12.5 In pea plants, round peas (R) are dominant to wrinkled peas (r). You do a test cross between a pea plant with wrinkled peas (genotype rr) and a plant of unknown genotype that has round peas. You end up with three plants, all which have round peas. From this data, can you tell if the round pea parent plant is homozygous dominant or heterozygous? If the round pea parent plant is heterozygous, what is the probability that a random sample of 3 progeny peas will all be round?
Cystic fibrosis is an autosomal disease that mainly affects the white population, and 1 in 20 whites are heterozygotes. Genetic testing can diagnose heterozygotes. Should a genetic screening program for cystic fibrosis be instituted? Should the federal government fund it? Should the program be voluntary or mandatory, and why?
You want to determine whether genes a and b are linked. What cross would you use and why? How would this cross tell you if they are linked?
The following pedigree shows the pattern of inheritance of red green color blindness in a family. Females are shown as circles and males as squares; the squares or circles of individuals affected by the trait are filled in red. What is the chance that a son of the third-generation female indicated by the arrow will be color-blind if the father is a normal man? If the father is color-blind?
A proband female with an unidentified disease seeks the advice of a genetic counselor before starting a family. Based on the following data, the counselor constructs a pedigree encompassing three generations: (1) The maternal grandfather of the proband has the disease. (2) The mother of the proband is unaffected and is the youngest of five children, the three oldest being male. (3) The proband has an affected older sister, but the youngest siblings are unaffected twins (boy and girl). (4) All the individuals who have the disease have been revealed. Duplicate the counselors feat
Design an Experiment Imagine that you are a breeder of Labrador retriever dogs. Labs can be black, chocolate brown, or yellow. Suppose that a yellow Lab is donated to you and you need to know its genotype. You have a range of dogs with known genotypes. What cross would you make to determine the genotype of the donated dog? Explain how the resulting puppies show you the Labs genotype.