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How many different types of gametes will...

How many different types of gametes will be formed by a pea plant with genotype TtYy upon self fertilization?

A

16

B

8

C

6

D

4

Text Solution

AI Generated Solution

The correct Answer is:
To determine how many different types of gametes will be formed by a pea plant with the genotype TtYy upon self-fertilization, we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Genotype**: The given genotype is TtYy. This means the plant has two traits: - T (Tall) with alleles T (dominant) and t (recessive) - Y (Yellow) with alleles Y (dominant) and y (recessive) 2. **Determine the Number of Heterozygous Alleles**: - In the genotype TtYy, there are two heterozygous pairs: Tt and Yy. - Each pair contributes to the formation of different gametes. 3. **Use the Gamete Formation Formula**: - The formula to calculate the number of different types of gametes is \(2^n\), where \(n\) is the number of heterozygous gene pairs. - Here, \(n = 2\) (since we have Tt and Yy). 4. **Calculate the Number of Gametes**: - Plugging into the formula: \[ 2^n = 2^2 = 4 \] - Therefore, the number of different types of gametes formed is 4. 5. **List the Possible Gametes**: - The possible gametes from TtYy are: - TY (T from Tt and Y from Yy) - Ty (T from Tt and y from Yy) - tY (t from Tt and Y from Yy) - ty (t from Tt and y from Yy) ### Final Answer: The pea plant with genotype TtYy will form **4 different types of gametes** upon self-fertilization. ---
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