Answer the following: What will be the ratio in F 2 generation in Mendel's dihybrid cross?

A dihybrid cross is a cross between two individuals that are both heterozygous for two different traits. As an example, let's look at pea plants and say the two different traits we're examining are colour and shape of seeds. Mendel observed that the F2 progeny of his dihybrid cross had a 9:3:3:1 ratio 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.

Rounded seeds (dominant trait) were crossed with wrinkled seeds (recessive trait). (i)What type of seeds will be produced in F 1 generation? (ii)By self-pollination in F 1 seeds, what percentage of seeds will be rounded shape in F 2 generation? Explain with diagram.

Mendel’s work went virtually unnoticed by the scientific community, which incorrectly believed that the process of inheritance involved a blending of parental traits that produced an intermediate physical appearance in offspring. This hypothetical process appeared to be correct because of what we know now as continuous variation. A monohybrid cross is one in which both parents are heterozygous (or a hybrid) for a single (mono) trait. Dominant refers to the relationship between two versions of a gene. A recessive trait is a trait that is expressed when an organism has two recessive alleles, or forms of a gene. Seed shape was one of the traits Mendel studied in his first set of experiments. (i) - Rounded seeds will be produced in F 1 generation. (ii) - The F 2 generation results from self-pollination of F 1 plants, and contained 75 % rounded seeds.

Write the phenotypic ratio obtained in the F 2 generation of Mendel’s Dihybrid cross experiment.

Two phenotypes (Tall and Dwarf) are seen in F 2 generation of Mendel monohybrid cross. The ratio of phenotype is 3:1. Mendel observed that the F 2 progeny of his dihybrid cross had a 9:3:3:1 ratio 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. Recessive allele fail to show its characteristics when present with dominant allele because then dominant allele show its characteristic phenotype.

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What is the definition of monohybrid cross?

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Science>Biology>Heredity and Evolution>Mendelian Inheritance

Describe Monohybrid cross and discuss the salient features which emerge from such a cross.

MEDIUM

Science>Biology>Heredity and Evolution>Mendelian Inheritance

A breeder crossed a pure breed tall plant having white flowers to a pure breed short plant having blue flowers. He obtained 202 F1 progeny and found that they are all tall having white flowers. Upon selfing these F1 plants, he obtained a progeny of 2160 plants. Approximately, how many of these are likely to be short and having blue flowers?

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Science>Biology>Heredity and Evolution>Mendelian Inheritance

Answer the following:

What will be the ratio in F₂ generation in Mendel's dihybrid cross?

MEDIUM

Science>Biology>Heredity and Evolution>Mendelian Inheritance

Explain Mendel's Law of dominance with example. Write any two importance of Mendel's law of inheritance.

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Science>Biology>Heredity and Evolution>Mendelian Inheritance

Discuss the monohybrid ratio given by Mendel.

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Science>Biology>Heredity and Evolution>Mendelian Inheritance

How do Mendel's experiments show that traits may be dominant or recessive?

HARD

Science>Biology>Heredity and Evolution>Mendelian Inheritance

Rounded seeds (dominant trait) were crossed with wrinkled seeds (recessive trait).
(i)What type of seeds will be produced in F₁ generation?
(ii)By self-pollination in F₁ seeds, what percentage of seeds will be rounded shape in F₂ generation? Explain with diagram.

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Science>Biology>Heredity and Evolution>Mendelian Inheritance

Which one of the following is the genotypic ratio at F2 generation of Mendel’s monohybrid cross?

HARD

Science>Biology>Heredity and Evolution>Mendelian Inheritance

Carl Correns conducted a hybridization experiment using Four O'Clock plants. Draw the checkerboard of F₂ generation for the incomplete dominance phenomenon, when he crossed a homozygous plant having red flowers (RR) with another homozygous plant with white flowers (WW). Mention its genotypic ratio.

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Science>Biology>Heredity and Evolution>Mendelian Inheritance

What is a monohybrid cross? Write the genotypic ratio and phenotypic ratio of Mendel’s monohybrid cross.

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Science>Biology>Heredity and Evolution>Mendelian Inheritance

Write the phenotypic ratio obtained in the F₂ generation of Mendel’s Dihybrid cross experiment.

HARD

Science>Biology>Heredity and Evolution>Mendelian Inheritance

What is the law of dominance of traits? Explain with an example.

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Science>Biology>Heredity and Evolution>Mendelian Inheritance

Write the genotypic ratio obtained at 2^nd filial generation in the monohybrid experiment done by Mendel.

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Science>Biology>Heredity and Evolution>Mendelian Inheritance

The genotypic ratio in F2 generation of monohybrid cross will be

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Science>Biology>Heredity and Evolution>Mendelian Inheritance

What would be the phenotypic ratio in the F2 generation of a monohybrid cross in case of incomplete dominance?

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Science>Biology>Heredity and Evolution>Mendelian Inheritance

Colour of seed or shape of seed of a pea plant-taking these two characters Mendel performed Dihybrid cross. Write the genotypes of pea plant having yellow and round seeds produced in the F2 generation of the experiment. State the law of independent assortment of Mendel.

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Science>Biology>Heredity and Evolution>Mendelian Inheritance

Which law Mendel concluded from his dihybrid cross experiment?

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Science>Biology>Heredity and Evolution>Mendelian Inheritance

How do Mendel's experiments show that traits may be dominant or recessive?

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Science>Biology>Heredity and Evolution>Mendelian Inheritance

If a cross is made between the plants having TT (tall) and tt (dwarf) genetic composition, which type of plants we will obtain in the next generation ?

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Science>Biology>Heredity and Evolution>Mendelian Inheritance

In a breed of dog, long-haired phenotype is recessive to short-hair. In a litter, one pup is short- haired and its sibling is long-haired. Consider the following possible phenotypes of the parents.

i. Both parents are short-haired.

ii. Both parents are long-haired.

iii. One parent is short-haired, and one is long- haired.

Choose the CORRECT combination of the possible parental phenotypes.

What is the definition of monohybrid cross?

Important Questions on Heredity and Evolution

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