A tall, heterozygous pea plant is crossed with another tall, heterozygous pea plant. What is the probability that an offspring will be a short plant? (1 point)
A. • 50%.
B. 0%
C. 25%
D. 75%
The probability of an offspring being short is determined by the genotype of the parents. In this case, both parents are heterozygous, meaning they carry one dominant allele (T) for tallness and one recessive allele (t) for shortness.
The Punnett square for this cross would be as follows:
Tt x Tt
The possible genotypes of the offspring are: TT, Tt, Tt, and tt. Out of these, only the genotype tt represents a short plant. Therefore, there is a 25% chance that an offspring will be short.
The correct answer is C. 25%.
To determine the probability of an offspring being short, we need to understand the inheritance pattern of the tall and short traits in pea plants.
In pea plants, the tall trait is dominant (T) and the short trait is recessive (t). The heterozygous pea plant (Tt) carries one copy of the tall allele and one copy of the short allele.
The cross between two heterozygous pea plants can be represented as follows:
Tt x Tt
To determine the probability of an offspring being short, we need to consider the possible combinations of alleles that can be inherited from the parents.
There are four possible allele combinations that can be inherited from the parents: TT, Tt, tT, and tt.
Out of these four combinations, only one combination (tt) will result in a short plant. The other combinations (TT, Tt, and tT) will result in tall plants.
Since there is only one combination out of four that will lead to a short plant, the probability of an offspring being short is 1/4 or 25%.
Therefore, the correct answer is C. 25%.
To determine the probability that an offspring will be a short plant, we need to understand the inheritance pattern of height in pea plants. In this case, tall is dominant (T) and short is recessive (t).
The tall, heterozygous pea plant can be represented as Tt, where T represents the dominant allele for tall and t represents the recessive allele for short.
When crossing two heterozygous plants (Tt × Tt), there are four possible combinations of alleles in the offspring: TT, Tt, tT, and tt.
Among these four possibilities, only the tt combination corresponds to the short plant phenotype.
The probability of each combination is as follows:
- TT: 1/4 or 25%
- Tt: 2/4 or 50%
- tT: 2/4 or 50%
- tt: 1/4 or 25%
Therefore, the probability of an offspring being a short plant (tt) is 1/4 or 25%.
The correct answer is C. 25%.