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What is the probility of production of d...

What is the probility of production of dwarf offsprings in a cross between two heterozygous tall pea plants ?

A

Zero

B

`50 %`

C

`25 %`

D

`100 %`

Text Solution

AI Generated Solution

The correct Answer is:
To solve the problem of determining the probability of producing dwarf offspring from a cross between two heterozygous tall pea plants, we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Genotypes**: - In this case, both parent pea plants are heterozygous for height. The genotype for a heterozygous tall plant is represented as Tt, where 'T' is the dominant allele for tallness and 't' is the recessive allele for dwarfism. 2. **Determine the Gametes**: - Each parent can produce two types of gametes: T (tall) and t (dwarf). Therefore, the gametes from both parents will be: - Parent 1: T, t - Parent 2: T, t 3. **Set Up a Punnett Square**: - Create a 2x2 Punnett square to visualize the possible offspring genotypes from the gametes of both parents. ``` T t ---------------- T | TT | Tt | ---------------- t | Tt | tt | ---------------- ``` 4. **Analyze the Offspring Genotypes**: - From the Punnett square, we can see the following genotypes for the offspring: - TT (homozygous tall) - Tt (heterozygous tall) - Tt (heterozygous tall) - tt (homozygous dwarf) 5. **Count the Phenotypes**: - The phenotypes corresponding to the genotypes are: - Tall (TT or Tt): 3 (TT + Tt + Tt) - Dwarf (tt): 1 6. **Calculate the Probability**: - The ratio of tall to dwarf plants is 3:1. This means that out of 4 total offspring, 3 will be tall and 1 will be dwarf. - To find the probability of producing dwarf offspring, we take the number of dwarf plants (1) and divide it by the total number of plants (4). - Probability of dwarf offspring = Number of dwarf offspring / Total offspring = 1 / 4 = 0.25 or 25%. ### Final Answer: The probability of producing dwarf offspring in a cross between two heterozygous tall pea plants is **25%**.
To solve the problem of determining the probability of producing dwarf offspring from a cross between two heterozygous tall pea plants, we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Genotypes**: - In this case, both parent pea plants are heterozygous for height. The genotype for a heterozygous tall plant is represented as Tt, where 'T' is the dominant allele for tallness and 't' is the recessive allele for dwarfism. 2. **Determine the Gametes**: ...
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