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Round shaped seeds with intermediate sized starch grains and wrinkled shaped seeds with small sized starch grains are produced as a result of a plant with small sized starch grains being crossed with a plant that has intermediate sized starch grains.
When a pea plant that produces seeds with starch grains of an intermediate size is crossed with other plants, what happens?
A pea plant that produces wrinkled seeds and little starch grains is crossed with a pure pea plant that produces round seeds with large starch granules. Self-pollination results in the formation of F1 heterozygotes.
How would one determine the genotype of round pea seeds that included moderate amounts of starch grains?
In the case of the garden pea, if gene B is the one that controls the production of starch, then the seeds of garden peas with the genotype Bb will be round and contain large starch grains. Starch granules that are round and of an intermediate size wrinkly and grainy with starch on the surface wrinkly and covered in big starch granules’
In a pea plant, what is the phenotypic ratio for the size of the starch grains?
Answer: The F2 generation of a Mendelian cross indicated that the ratio of genotypes to phenotypes is the same as 1: 2: 1, and this holds true for both ratios.
In the F2 generation of peas, what percentage of the seeds will have starch grains that are of an intermediate size?
ExplanationThe percentage of the desired characteristic trait that can be gained through self-crossing will be 25%.
The formation of starch in pea seeds, Chapter 5, Part 6; Class 12
26 questions found in related categories
How is it that the pea plant is able to manage both the amount of starch and the form of the seed?
Pisum sativum is controlled by a single gene, which determines both the size of the starch grain and the form of the seed. The term “pleiotropy” refers to this pattern of inheritance. There is an incomplete dominance in terms of the size of the starch grain. The form of the seed is determined by the law of dominance.
What kind of phenotypic ratio may we expect in the F2 generation?
In the F2 generation, a phenotypic ratio of 3:1 and a genotypic ratio of 1:2:1 are considered to be normal.
In pea plants, what exactly is the process of starch synthesis?
The gene in the pea that controls the production of starch demonstrates pleiotropy. Both the synthesis of starch and the morphology of the seed are controlled by this gene. It possesses two different alleles, B and b. BB homozygotes are responsible for the synthesis of starch, which results in the production of big granules of starch.
In the event where dominant epistasis is present, what is the phenotypic ratio of F2?
The phenomenon known as dominant epistasis describes situations in which the dominant allele of one gene obscures the effects of either allele of another gene. The Bombay phenotype is an example of the ABO blood group. In F2, the phenotypic ratios are 9:3:4, respectively.
Is there more than one allele for starch production in peas?
There is no evidence that many alleles play a role in pea starch production. One gene, which contains two alleles, is responsible for its control. Another fascinating example of pleiotropy may be found in pea plants (Pisum sativum), specifically in relation to the production of starch.
In the second generation of offspring from a monohybrid cross, what will the genotypic ratio of the yellow seeds be?
1 : 3 : 1.
In the case of the garden pea, which of the following characteristics is a recessive trait?
In his experiment, the yellow seed color was found to be the dominant character for seed color, whereas the green seed color was the recessive character.
How many characteristics that are mutually exclusive does Mendel select?
Mendel chose seven different pairs of contrasting pea plant characteristics to study. There were two of these that had opposing characteristics of a pea pod. It was the pod color (green or yellow) as well as the pod form (inflated or constricted).
In the event where dominant epistasis is present, what is the phenotypic ratio?
This phenomenon is referred to as dominant epistasis, and it results in a segregation ratio such as 12:3:1. This ratio can be understood as a variation of the 9:3:3:1 ratio, in which the A_B_ class is coupled with one of the other genotypic classes that contains a dominant allele.
What is the F2 Dihybrid ratio when it comes to genes that interact in a recessive epistatic manner?
It is a Mendel dihybrid ratio with some modifications. B.Epistatic gene: An epistatic gene is a gene that inhibits the expression of another gene, and the process of epistasis refers to the interference that this gene causes. Because of these genes, the F2 generation can produce progeny with either a 9:3:4 or a 12.3.1 ratio of progeny.
How is starch created in the body?
ADP-Glc pyrophosphorylase, which is responsible for the synthesis of sugar nucleotide precursors; starch synthase, which extends the alpha-1,4-linked glucan chains by utilizing ADP-Glc; starch-branching enzymes, which introduce alpha-1,6 branch points in order to form amylopectin; and starch debranching, which removes the alpha-1,6 branch points….
Which of the following is an accurate description of the process through which peas produce starch?
One gene, for instance, is responsible for controlling the production of starch in pea seeds. It possesses both alleles. BB homozygotes have an increased capacity for the synthesis of starch, which results in the production of larger starch grains. BB homozygotes, on the other hand, have a reduced capacity for starch synthesis and result in the production of smaller starch grains.
Explain the concept of pleiotropy using the process of starch synthesis in pea seeds as an illustration.
Pleiotropy is a phenomenon in which a single gene impacts multiple features or phenotypes. For instance, synthesis in pea is controlled by a single gene, and same gene is also responsible for the shape of the seed. Pleiotropy is a condition known as a pleiotropic effect.
How does the F2 generation manifest itself in terms of its phenotype?
In the F2 generation that resulted, three quarters of the individuals displayed the dominant phenotype, whereas one quarter displayed the recessive trait. For instance, when a round seed line was bred with a wrinkled seed line, the resulting F1 generation consisted entirely of round seeds, whereas the F2 generation displayed a phenotypic ratio of three round seeds to one wrinkled seed.
In the case of a dihybrid cross, what is the phenotypic ratio of the F2 generation?
Mendel noticed that the F2 progeny of his dihybrid cross produced offspring with a ratio of 9:3:3:1 and produced nine plants with round, yellow seeds, three plants with round, green seeds, three plants with wrinkled, yellow seeds, and one plant with wrinkled, green seeds. Additionally, Mendel observed that the F2 offspring had a 9:3:3:1 ratio.
How would you describe the phenotypic With the F2 generation, what is the monohybrid ratio?
In the F2 generation produced by a monohybrid cross, there are two phenotypes observed: tall and dwarf. Three to one is the ratio of the phenotypic.
In pea, the phenotypes that result from the presence of the allele BB for seed shape and size of starch grain are as follows:
Pea plants that have the genotype Bb produce seeds that have an intermediate starch grain and are circular.
What seven characteristics distinguish a pea plant from other plants?
- Pea shape
- Pea color
- Pod-like form
- Pod color
- hue of the flowers
- Plant size
- Placement of the flowers
How does inheritance occur via several genes?
When a single trait is regulated by more than one gene, this type of inheritance is called polygenic inheritance. Most of the time, the amount of genes is high but their effects are low. Height, skin color, eye color, and weight are all examples of polygenic traits that can be inherited by humans.