When you cross a tall pea plant with a short pea plant?
When you cross a tall pea plant with a short pea plant?
When a tall and short plant are crossed, all of the offspring are tall. If the offspring self-fertilize, they produce tall and short plants in a ratio of 3:1 in the next generation. Mendel’s actual counts were 787 tall:277 short plants in this generation (2.84:1 ratio).
What is the genotype of a tall pea plant?
| Parent Pea Plants (P Generation) | Offspring (F1 Generation) | |
|---|---|---|
| Genotypes: TT x tt | Phenotypes: tall x short | Genotypes: 100% Tt |
Why is a plant with genotype TT referred to as heterozygous?
Answer: because it has two different allele.
When Mendel crossed a tall pea plant with a dwarf pea plant no plants of medium height were obtained in the F1 Generation Why?
Why? Ans. Because dominant genes express themselves and suppress the effect of recessive genes. So no medium sized plants were obtained.
When a tall plant is crossed with a dwarf plant .what will be the ratio of tall to dwarf plants in F1 generation show with a help of Mendel’s cross?
A cross between pure breeding tall (TT) and dwarf (tt) plants produce all tall (Tt) plants in F1 progeny. These heterozygous tall plants produce 50% gametes with “T” allele and 50% with “t” allele. Random fusion of these gametes from two heterozygous tall plants gives tall and dwarf plants in 3:1 ratio.
Why did Mendel self pollinate the tall F1 plants to get the F2 generation and crossed a pure breeding tall plant with a pure breeding dwarf plant to obtain the F1 generation?
The genotype of 50% of the offspring will resemble one parent and the rest 50% will resemble the other parent. The F1 generation obtained from the cross is heterozygous. So selfing the F1 generation is sufficient to obtain the F2 generation. So selfing the F1 generation is sufficient to obtain the F2 generation.
What will be the genotype of a tall plant which on self crossing gives rise to a few dwarf plants also?
The plants of genotype Tt are self-pollinated. For the parental cross, both the parents are true breeding plants, the tall plant is homozygous for the tall allele T, while the dwarf plant is homozygous for the dwarf allele ‘t’. Mendel tracked each trait through two generations.
When a tall plant was self pollinated one fourth of the progeny were dwarf?
Answer: The tall pea plant that was selfed must be heterozygous in nature i.e having gametes T and t. The cross will be: Tt × Tt results in 1 TT ,2 tt(all of which are tall plants)and 1 tt,which will be the only dwarf plant.
When a plant homozygous for tall is crossed with a plant homozygous for dwarf?
ANSWER: The condition given is that a plant (Homozygous tall) is crossed with a plant (Homozygous dwarf), then the appearance of the plats or saplings at the F₁ generation would be all tall plants. The plants are homozygous tall, so their alleles will be the same.
What is the genotype of homozygous dwarf pea plant?
The selfing of heterozygous tall plants yields F2 generation with the genotypic ratio of 1 TT (homozygous tall): 2 Tt (heterozygous tall): 1 tt (homozygous dwarf). Thus, the correct answer is option B.
Where are genes located What is the chemical nature of gene write the full form of DNA?
Genes are located on chromosomes in linear sequence and at fixed positions. Chemically, genes are acidic in nature since they are nucleic acids which constitute DNA.