When you cross a tall pea plant with a short pea plant the offspring will be?
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).
Why are the plants always tall when a tall pea plant is crossed with a short pea plant?
The cross between tall and short pea plant produces the tall progeny. The tall progeny is present in heterozygous condition and the tall trait is dominant that express itself and hides the expression of short trait.
What is the progeny always tall?
Class 10 Question As we know T is a dominant character whereas t is a recessive character. therefore tallness is dominant thus the progeny is always tallness in f1. The gene for Tallness is dominant over the gene for dwarfness. So in the presence of the dominant gene the gene for dwarfness does not express itself.
What does the progeny of a tall plant?
Answer. The progeny of a tall plant with round seed (TTRR) and a short plant with wrinkled seed (ttrr) would be Tall plant with round seeds (TtRr) and thus will appear same as the allele for tall plant and round seeds are dominant over the alleles for short plants with wrinkled seeds.
Why is F2 progeny different from F1 progeny?
F1 progeny shows the traits of only one parent while in F2 progeny the traits of parents are randomly generated.
Why is F1 progeny always of tall plants?
Answer. Answer: When a tall pea plant is crossed with a short pea plant, the resultant progeny is always tall because tall is dominant trait and short is recessive trait. Therefore, dominant trait expresses itself in the progeny.
What is the phenotype of F1 progeny and why?
When the gametes join in the zygotes of the F1 generation, each individual receives one dominant allele and one recessive allele (Yy), and thus all of the F1 generation shows the dominant phenotype (e.g. yellow peas). This is the uniform phenotype observed for the F1 generation.
What happens when the F1 progeny obtained above are used to produce F2 progeny by self pollination?
Answer. Then the hidden characteristics or the recessive traits in F1 progeny will be exhibited in the F2 progeny.
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 happens when F1 progeny obtained?
Explanation: When, he used these F1 progeny to generate F2 progeny by self-pollination, he found that some F2 progeny were tall plants with round seeds, and some were short plants with wrinkled seeds. …
How does F2 progeny obtain self pollination?
b) In the F2 progeny , one quarter of the plants are short (tt)and rest are tall (Tt). It have 1:2:1 ratio of TT, Tt And tt trait combinations. c) F 1 and F 2 progeny are different because F 2 progeny is obtained by self pollination of F 1 plants (Tt) and F 1 is the progeny of parental plants.
Why did Mendel make the first generation of plants self pollinate?
Pea plants are naturally self-pollinating. Mendel was interested in the offspring of two different parent plants, so he had to prevent self-pollination. He removed the anthers from the flowers of some of the plants in his experiments. Then he pollinated them by hand with pollen from other parent plants of his choice.
What do you think he would have got had he self pollinated a tall F2 plant?
what do you think mendel would have got had he self pollinated a tall F2 plant? Tall F2 plant can be heterozygous as well as homozygous in genotype. In the second case of homozygosity, self pollination will give all tall plants.
What is Gregor Mendel’s second law?
Mendel’s Second Law – the law of independent assortment; during gamete formation the segregation of the alleles of one allelic pair is independent of the segregation of the alleles of another allelic pair.
What is not a phenotype?
A genotype refers to the genetic characteristics of an organism. A phenotype refers to the physical characteristics. For example, having blue eyes (an autosomal recessive trait) is a phenotype; lacking the gene for brown eyes is a genotype.