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.

Heredity is the study of the transmission of genes from parents to offspring and the laws governing such a transmission. Along with genetic characters, variations also appear during the transmission. Branch of biology that deals with the study of heredity and variations are called genetics.

DNA is a genetic material present in all living organisms. It is a double helix. It contains deoxyribose sugar, nitrogen bases and a phosphate group. It is located in the nucleus of the cell. The DNA is enclosed by a chromosome with histone proteins.

EASY

Earn 100

The phenotypic ratio of Mendel's monohybrid cross in F2 generation is

50% studentsanswered this correctly

Important Questions on Heredity and Evolution

HARD

Science>Biology>Heredity and Evolution>Heredity

Answer the following:

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

MEDIUM

Science>Biology>Heredity and Evolution>Heredity

Ramesh has two daughters and his wife is pregnant again. He desires to have a son. So he forces his wife Maya to go for Sonography for sex determination of the child.

Who is responsible if the child born is a girl or a boy? Father's or Mother's sex chromosome.

MEDIUM

Science>Biology>Heredity and Evolution>Heredity

The continuity of features from one generation to another is known as

MEDIUM

Science>Biology>Heredity and Evolution>Heredity

Answer the following:

Name:

The sex chromosome boys inherit from their father.

MEDIUM

Science>Biology>Heredity and Evolution>Heredity

How is the sex of the child determined in human beings?

MEDIUM

Science>Biology>Heredity and Evolution>Heredity

Answer the following:

Why do all gametes formed in females have only X chromosomes?

MEDIUM

Science>Biology>Heredity and Evolution>Heredity

Possibilities of birth of the male and female are the same. Give scientific reason.

HARD

Science>Biology>Heredity and Evolution>Heredity

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.

EASY

Science>Biology>Heredity and Evolution>Heredity

Define the heredity.

MEDIUM

Science>Biology>Heredity and Evolution>Heredity

Ramesh has two daughters and his wife is pregnant again. He desires to have a son. So he forces his wife Maya to go for Sonography for sex determination of the child.

Is the sex determination test illegal? Why?

MEDIUM

Science>Biology>Heredity and Evolution>Heredity

Gauri hurts her hand in an accident and two fingers had to be cut off. Her child is born with all the fingers on his hand. What conclusion can you draw from this?

MEDIUM

Science>Biology>Heredity and Evolution>Heredity

How is the sex of child determined in human beings?

EASY

Science>Biology>Heredity and Evolution>Heredity

In the diagram what is the sex of (A) and (B).

Question Image

EASY

Science>Biology>Heredity and Evolution>Heredity

Select the correct alternative from those given below each statement and write the completed statement:

In Mendel’s breeding crosses, F₂ generation was produced through _____.

HARD

Science>Biology>Heredity and Evolution>Heredity

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

MEDIUM

Science>Biology>Heredity and Evolution>Heredity

Where are the genes found?

MEDIUM

Science>Biology>Heredity and Evolution>Heredity

Where is DNA found?

MEDIUM

Science>Biology>Heredity and Evolution>Heredity

Ramesh has two daughters and his wife is pregnant again. He desires to have a son. So he forces his wife Maya to go for Sonography for sex determination of the child.

In the case of Ramesh's daughters which set of chromosomes is not present in them?

MEDIUM

Science>Biology>Heredity and Evolution>Heredity

What are Genetics? Explain Mendel law of dominance with line diagram.

HARD

Science>Biology>Heredity and Evolution>Heredity

Who is known as the father of Genetics?

The phenotypic ratio of Mendel's monohybrid cross in F2 generation is

Important Questions on Heredity and Evolution

Learn and Prepare for any exam you want !