The dominance concept explains that the
trait that can express itself even in heterozygous condition
is dominant trait. The trait that can express itself in homozygous condition only is known as recessive trait. The cross between tall and short pea plant produces the tall progeny.
When you cross a tall pea plant with a short pea plant?
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%.
Why are the plants always tall when a tall pea plant is crossed with a short pea plant?
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.
Why f1 progeny always tall plants when a tall pea plant is crossed with a short pea plant How is f2 progeny obtained by self pollination of f1 progeny different from f1 progeny write a detailed conclusion of this cross?
Because in f1 generation it’s sufficient to be tall if it has single tall character. so in f1 generation all are tall pea plants. B.In
f1 progeny it contains both the tall and short character
. so by self pollination it obtain f2 progeny.
What does the progeny of a tall plant?
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 would a pea plant that is heterozygous for plant height have the dominant phenotype?
Transcribed image text: QUESTION 6 A pea plant that is heterozygous for plant height shows the dominant phenotype of “tall
because the dominant allele masks the effect of the recessive allele
. … dominant alleles are better, stronger, and more common in the population.
When two heterozygous tall pea plants are crossed what would the expected?
| Question Answer | When two heterozygous tall pea plants are crossed, the expected genotype ratio of the offspring is _________________________. 1:2:1 | An organism’s gametes have ____________________ the number of chromosomes found in the organism’s body cells. half |
|---|
What is the genotype of a short pea plant?
| Genotype Symbol Genotype Vocab Phenotype | TT homozygous DOMINANT or pure tall tall | Tt heterozygous or hybrid tall | tt homozygous RECESSIVE or pure short short |
|---|
What is the phenotype of the F1 progeny when Mendel crossed tall and short pea plants?
Explanation: Mendel took tall pea plants with genotype TT and short pea plants with genotype tt and produced F1 progeny through cross fertilisation the resultant progeny are in
3:1
ratio.
How do tall pea plants produce short pea plants?
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 happens when the F1 progeny obtained above are used to produce F2 progeny by self pollination?
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.
… Thus, Mendel’s experiments show that the tall/short trait and the round seed/wrinkled seed trait are independently inherited.
What do the progeny of a tall plant with round seeds and a short plant with wrinkled seeds look like and why?
The progeny of long plant with round seeds (TTRR) and crossed with short plants with wrinkled seeds (ttrr) are all long plants with round seeds (TtRr). This is because
tallness and round shape are both dominant traits while shortness and wrinkled shapes of seeds are recessive traits
.
What do the progeny of a tall plant with round seeds and a short plant with wrinkled Seedslook like why?
What do the progeny of a tall plant with round seeds and a short plant with wrinkled-seeds look like?
They are all tall and have round seeds
. Tallness and round seeds are thus dominant traits.
What does the F1 progeny of a tall plant with round seeds?
During an experiment when a pure tall plant with round seeds (TTRR) is crossed with a dwarf plant having wrinkled seeds (ttrr) . The gametes formed are TR and tr. In the first F1 generation, all the plants are tall with rounded seeds that mean the F1 progeny
TtRr
is formed.
What is the difference between the F1 and F2 generation?
The term “F1” means the “first filial generation,” or the initial cross between two genetically distinct plants. … An
“F2” cross is the next generation
, or the result of crossing two sister seedlings from the F1 cross.
