Inherited Characters

Q. If every cell has chromosome, then why are there only 46 chromosome in the human body?

Q.

A man with blood group A marries a woman with blood group O and their daughter has blood group O. Is this information enough to tell you which of the traits- blood group A or O - is dominant? Why or why not?

Q.

Do animals have blood groups?

Q.

Choose the correct option-

A marriage between a colourblind man and a normal woman produces-

1. 50% carrier daughters and 50% normal daughters

2. All carrier daughters and normal sons

3. All carrier offsprings

4. 50% colourblind sons and 50% normal sons

Q. Different characteristics of the offsprings when compared to their parents is due to different combination of genes.

1. True
2. False

Q.

How are traits passed onto the next generation?

Q.

What do you mean by contrasting characters? Give a list of at least four contrasting characters that Mendel selected for his experiments on peaplant.

Q.

What is the functional segment of DNA called?

Q.

Choose the correct option-

Among the following characters, which one was not considered by Mendel in his experiments on pea?

1. Seed colour – ­Green or yellow

2. Trichomes – ­Glandular or non glandular

3. Stem­ height – Tall or dwarf

4. Pod shape – Inflated or constricted

Q. Name the unit of inheritance. What is its function?

Q.

The phenomenon by which one gene controls many traits is called:

1. pleiotropy

2. polygenic inheritance

3. multiple allelism

4. dominance

Q.

Is hair colour a polygenic trait?

Q.

Do animals have blood types?

Q.

What is gene expression and why it is important?

Q.

What are the symptoms of schizophrenia?

Q.

Cellular DNA is the information source for making proteins.

1. True
2. False

Q.

Name the following:

The structure that transmits characteristics from parent to offsprings.

Q.

A trait in an organism is influenced by both maternal and paternal DNA.

1. True
2. False

Q. Why did Mendel choose garden pea for his experiments? [5 MARKS]

Q.

Differentiate between inherited and acquired characters. Give one example for each type.

Q.

A couple with a newborn baby is troubled that the child does not resemble either of them. Suspecting that a mixup occurred at the hospital, they check the blood type of the infant. It is type O. Because the father is type A and the mother type B, they conclude that a mixup has definitely occurred. Are they correct ? Give reason for your answer.

Q.

What are the possible blood groups likely to be inherited by children born to a group A mother and a group B father? Explain your reasoning.

Q.

Which one of the following is not associated with reproduction?

1. A new leaf coming out of a tree branch

2. A dog giving birth to a puppy

3. A seed growing into a plant

4. Chick hatching from an egg

Q. A man with blood group A has married a women of blood group ofOand their daughter has got ablood group of O.Is information enough to tell u which of the trait is dominant? Why? Why not?

Q. Two linked genes a and b shown 20% recombination. The individuals of a dihybrid cross between ++/++ * ab/ab shall show gametes 1 ++80 : ab : 20 2 ++50 : ab : 50 3 ++40 : ab 40 : +a10 : +b : 10 4 ++30 : ab 30 : +a20 : +b : 20

Q.

Are genes the units of inheritance?

Q.

Say True or False.
Variations that affect germ cells are called Somatic variation.

1. True

2. False

Q. Meaning of dominance and recessiveness

Q.

Give an example of the traits that are inherited from parents in the case of humans.