Question

Q.Read the following and answer the following questions.
Mendel studied the inheritance pattern of traits in a Pea plant.According to this study,he obtained 9:3:3:1 ratio of certain traits(i.e. height of the plant and shape of the seed) in progeny of F2 generation.Based on it answer these questions:

(i)The trait of F1 progeny is:
a.Tall and round seeds
b.Dwarf and wrinkled seeds
c.Tall and wrinkled seeds
d.Dwarf and round seeds

(ii)The trait which will have the ratio (9) is
a.Tall and round seeds
b.Dwarf and wrinkled seeds
c.Tall and wrinkled seeds
d.Dwarf and round seeds

(iii)The phenotypic ratio (9:3:3:1) is applicable to which law?
a.Law of dominance
b.Law of segregation
c.Law of Independent assortment
d.None of these​

(iv)The trait which will have the ratio (1) is
a.Tall and round seeds
b.Dwarf and wrinkled seeds
c.Tall and wrinkled seeds
d.Dwarf and round seeds

(v)What will be the phenotype of plants in F1 generation?
a.All offspring's will be tall and having round seeds
b.All offspring's will be short and having round seeds
c.Few will be tall and few will be short
d.All offspring's will be dwarf and having wrinkled seeds.
​

Answer 1

$\bf\huge{Answer :}$

(i) The trait of F1 progeny is:

• Tall and round seeds. (Option A)

(ii) The trait which will have the ratio (9) is

• Tall and round seeds (Option A)

(iii) The phenotypic ratio (9:3:3:1) is applicable to which law?

• Law of Independent assortment. (Option C)

(iv)The trait which will have the ratio (1) is

• Dwarf and wrinkled seeds. (Option B)

(v) What will be the phenotype of plants in F1 generation?

• All offspring's will be tall and having round seeds. (Option A)

$\bf\huge{ Additional\: information :}$

The Gregor Johann Mental, An Austrian Geneticist introduced the three laws of inheritance. He is also known as the father of genetic. They were -

• Law of dominance.
• Law of segregation.
• Law of independent assortment.

He Experiment with Pea plant (Pisum Sativam) because -

1. The pea plants are easy to grow.
2. They require little care.
3. The flowers of pea have bisexual characters.
4. They've short life span.
5. The flowers of pea plants allow self fertilization and cross fertilization as well.

Answer 2

Required Answer :-

1] The trait of F1 progeny is

a. Tall and round seeds [correct]

b. Dwarf and wrinkled seeds

c. Tall and wrinkled seeds

d. Dwarf and round seeds

2] The trait which will have the ratio (9) is

a. Tall and round seeds [correct]

b. Dwarf and wrinkled seeds

c. Tall and wrinkled seeds

d. Dwarf and round seeds

3] The phenotypic ratio (9:3:3:1) is applicable to which law?

a. Law of dominance

b. Law of segregation

c. Law of Independent assortment [correct]

d. None of these​

4] The trait which will have the ratio (1) is

a. Tall and round seeds

b. Dwarf and wrinkled seeds [correct]

c. Tall and wrinkled seeds

d. Dwarf and round seeds

5]What will be the phenotype of plants in F1 generation?

a. All offspring's will be tall and having round seeds[correct]

b. All offspring's will be short and having round seeds

c. Few will be tall and few will be short

d. All offspring's will be dwarf and having wrinkled seeds.

Law of Independent assortment

The law of Independent assortment states that if more than two alleles of the different genes are grouped and stored in the cells.