**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 ]

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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

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**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 ]

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