What is the probability of producing a tall pea plant from a genetic cross between two hybrid tall pea plants?
If they are hybrid, then both are Ts. Use. a Punnet square to confirm the answer, .75.
3/4
To determine the probability of producing a tall pea plant from a genetic cross between two hybrid tall pea plants, you need to know the genotypes of the parent plants.
Let's assume that the genotype for a tall pea plant is represented by "T" (dominant allele) and the genotype for a short pea plant is represented by "t" (recessive allele).
If the two hybrid tall pea plants have the genotype "Tt" (meaning they each have one dominant allele and one recessive allele), then there are a few possible outcomes based on the principles of Mendelian genetics.
In this case, the cross between the two Tt plants can result in the following genotypes in their offspring:
- TT (25% chance): Homozygous dominant, resulting in a tall pea plant
- Tt (50% chance): Heterozygous, also resulting in a tall pea plant
- tt (25% chance): Homozygous recessive, resulting in a short pea plant
So, the probability of producing a tall pea plant from a genetic cross between two hybrid tall pea plants is 75% (combining the probabilities of TT and Tt genotypes).
To determine the probability of producing a tall pea plant from a genetic cross between two hybrid tall pea plants, you need to understand the basic principles of genetics and Mendelian inheritance. In this case, we are dealing with a monohybrid cross, which involves the inheritance of a single trait (tallness).
The height of pea plants is typically determined by two alleles, or variants, of a gene: "T" for tallness (dominant) and "t" for shortness (recessive). The genetic makeup of a hybrid tall pea plant is represented by the genotype "Tt," with one allele for tallness and one allele for shortness.
When two hybrid tall pea plants are crossed, or mated, the possible outcomes for their offspring can be predicted using a Punnett square. To construct a Punnett square, write the possible alleles for each parent along the top and left side of a 2x2 grid. In this case, both parents have the genotype "Tt."
| T | t |
------------------
T | TT | Tt |
t | Tt | tt |
Each box of the Punnett square represents a possible combination of alleles that could occur in the offspring. The genotypes TT and tt represent purebred tall and purebred short plants, respectively.
Now, let's determine the probability of producing a tall plant. Out of the four possible combinations in the Punnett square, three of them (TT, Tt, and Tt) correspond to tall plants (since the "T" allele is dominant). Therefore, the probability of producing a tall pea plant is 3/4 or 75%.
It is important to note that this probability is based on the assumption that the hybrid tall plants are true hybrids (heterozygous) and that the tallness trait follows a simple Mendelian inheritance pattern.