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What is the ratio of a progeny of cross ...

What is the ratio of a progeny of cross between `F_(1)` heterozygous and recessive

A

`3 : 1`

B

`1 : 2 : 1`

C

`1 : 1`

D

`2 :1`

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the ratio of progeny from a cross between an F1 heterozygous plant and a recessive plant, we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Genotypes**: - Let's assume the tall plant (F1 heterozygous) has the genotype Tt (where T = tall and t = dwarf). - The recessive plant will have the genotype tt. 2. **Determine the Gametes**: - The F1 heterozygous plant (Tt) can produce two types of gametes: T and t. - The recessive plant (tt) can only produce one type of gamete: t. 3. **Set Up the Punnett Square**: - We can create a Punnett square to visualize the cross: ``` T t ---------------- t | Tt | tt | ---------------- t | Tt | tt | ---------------- ``` 4. **Analyze the Offspring**: - From the Punnett square, we can see the possible genotypes of the offspring: - Tt (tall) - 2 occurrences - tt (dwarf) - 2 occurrences 5. **Calculate the Ratio**: - The ratio of the offspring is 2 tall (Tt) to 2 dwarf (tt), which simplifies to a ratio of 1:1. ### Final Answer: The ratio of progeny from the cross between an F1 heterozygous plant and a recessive plant is **1:1**. ---
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