The phenotype of a plant with the genotype Tt would be tall. Here tallness (T) is a dominant trait over dwarfness (t), which is recessive. Tallness and dwarfness (stem height) are one of the seven contrasting pairs of traits in pea plants studied by Mendel.
What is the phenotype of a plant with the genotype TT?
What is the phenotype of a pea plant that is homozygous dominant ( TT ) for the tall trait? Tall. What is the phenotype of a pea plant that is heterozygous ( Tt )? It is also tall.
|Heterozygous||One dominant allele and one recessive allele||Tt|
|Homozygous dominant||Two dominant alleles||TT|
What is the genotype ratio for TT and TT?
Case: A cross between two medium heights (Tt X Tt), where the phenotypes, TT, for “tall”, Tt, for “medium”, and tt, for “short”.
2. Incomplete dominance.
|Incomplete dominance Case: Cross between Tt X Tt|
|Genotypic ratio: 1:2:1|
Is TT heterozygous?
An organism can be either homozygous dominant (TT) or homozygous recessive (tt). If an organism has two different alleles (Tt) for a certain gene, it is known as heterozygous (hetero means different).
How are the plant height genotypes TT and TT similar?
Tallness is the recessive trait for plant height; therefore, the genotypes with Tt and TT would have the same phenotype. … Tallness is a recessive trait in pea plants. C. Tallness is the dominant trait for plant height; therefore, the genotypes with Tt and TT would have the same phenotype.
Is TT tall or short?
The “TT” and “Tt” crosses both have at least one “T” allele, so they are tall plants. However, the last cross “tt” doesn’t have any “T” alleles and is short, because it is homozygous recessive . Since 1 out of 4 pea plants are short, or 1/4, the probability of a short pea plant from a heterozygous cross is 25%.
What happens when TT is crossed with TT?
The cross between TT and Tt is called back cross, which results into two homozygous and two heterozygous dominant gametes.
Why is the TT phenotype tall?
Genotypes for plant height are TT, Tt, tt. … Phenotypes for plant height are tall or short. TT and Tt genotypes both expressed the tall phenotype because the T is dominant to t. Only the tt genotype expressed the short phenotype.