Mendel's Experiments

Q. Why did Mendel select pea plant for his experiments?

1. It has short life cycle
2. It undergoes self-pollination
3. Flowers of this plant are unisexual
4. It shows contrasting heritable characters

Q.

Law of independent assortment is applicable to genes present on the same chromosome

1. True

2. False

Q.

Maximum height of a plant is 30ft and the minimum height is 10ft. If plant height is controlled by 3 pairs of genes then the height of a plant with genotype AaBbCc will be:

1. 13.2ft

2. 23.2ft

3. 16.6ft

4. 19.9ft

Q.

How many plants are dihybrid in F2 generation of dihybrid cross?

Q. Who is known as father of genetics?

Q. The punnett square shown below represents the pattern of inheritance in a dihybrid cross when yellow seed colour (Y) is dominant over white (y) and round shape (R) is dominant over wrinkled (r) seeds:

A plant of type 'H' will produce seeds with genotypes identical to the seeds produced by the plants of:

1. Type U
2. Type M
3. Type S
4. Type N

Q.

Pea plants are more suitable than mice for Mendel's experiments.

1. True

2. False

Q. When a homozygous tall plant is crossed with a homozygous dwarf plant, what will be the phenotypic ratio of tall and dwarf plants in F2 generation?

1. 3:1
2. 2:1
3. 1:2:1
4. 1:1

Q.

How many different phenotypes and genotypes are obtained in the $F_2$ generation of Mendel’s dihybrid cross?

1. 16 phenotypes and 8 genotypes

2. 2 phenotypes and 16 genotypes

3. 4 phenotypes and 16 genotypes

4. 4 phenotypes and 9 genotypes

Q. What will be the ratio of tall and dwarf plants in the F2 generation when a tall plant carrying two identical alleles is crossed with a dwarf plant carrying two identical alleles?

1. 3:1
2. 2:1
3. 1:2:1
4. 1:1

Q. Study the image and choose the option/s that depict self pollination and cross pollination respectively.

1. A and B depict self pollination, while C depicts cross pollination.
2. A depicts self pollination, while C depicts cross pollination.
3. A depicts self pollination, while B and C depicts cross pollination.
4. A and C depicts self pollination, while B depicts cross pollination.

Q. ntYellow bodied;white eyed females were crossed with brown-bodied, red eyed male in a dihybrid cross conducted by Morgan. What percentage of F2 progeny was recombinant type?n nt1. 1.3%n nt2. 37.2%n

Q. When Mendel crossed a pure tall pea plant with a pure dwarf pea plant, _______ was obtained in the F1 generation.

1. TT
2. tt
3. Tt
4. PT

Q.

In pea plants, round seed is dominant over wrinkled seed. A plant with different alleles for round seeds was crossed with a plant with same alleles of wrinkled seeds. Which of the following can be the expected result?

1. 301 round and 100 wrinkled

2. 305 round and 301 wrinkled

3. 200 round and 100 wrinkled

4. 99 round and 300 wrinkled

Q. Two pure breeds of pea plant, one with yellow colour seeds (Y) and other with green colour seeds (y) are crossed to obtain $F_1$ generation. The genotypic ratio for the resulting ${F_2}^{}$ generation will be:

1. 3:1
2. 1:3:1
3. 1:2:1
4. 9:3:3:1

Q.

In a dihybrid cross, the formation of new combinations in F2 generation totally different from parental types. It can be explained by …………………..

1. law of dominance

2. law of recessiveness

3. law of independent assortment

4. Both A and B

Q.

A pea plant with round and yellow seeds (RRYY) is crossbred with another pea plant having wrinkled and green seeds (rryy). Among the offspring obtained in F₂ generation, plants with which traits were found to be maximum in number?

1. Wrinkled green seeds

2. Round green seeds

3. Round yellow seeds

4. Wrinkled yellow seeds

Q.

The dominant allele is represented by a lower case letter.

1. True

2. False

Q.

Question 1
A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers, but almost half of them were short. This suggests that the genetic makeup of the tall parent can be depicted as
(a) TTVV
(b) TTvv
(c) TtVV
(d) TtVv

Q.

Triticale is obtained by

1. interspecific cross

2. intraspecific cross

3. intergeneric cross

4. intrageneric cross

Q.

In a plant, the red colour of the flower is dominant over white. A cross was made between a plant containing red flower and other with white flower. The cross yielded 50% white-flowered plant and 50% red flowered plant. The trait of the parent with the red flower has:

1. Homozygous

2. Heterozygous

3. Cannot be determined

4. Can be homozygous or heterozygous

Q.

Mention the advantages of selecting pea plant for the experiment by Mendel?

Q. Which amongst the following were the traits that Mendel observed in his experiments on pea plants?

1. Shape of the pod
2. Position of the flower
3. Shape of the seed
4. Colour of the pod

Q. What are the laws of mendel.Why is he known as father of genetics????

Q.

Pea plants are more suitable than mice for Mendel's experiments, because pea plants can be self-fertilised, are easy to grow in large numbers and have a short life cycle.

1. True

2. False

Q.

Select the incorrect option:

Mendel used the garden pea plant for his hybridization experiment because:

1. It is easy to grow
2. It has easily distinguishable and inheritable characters
3. It has a very long life span
4. It is easily self pollinated

Q.

Study of fossils is known as

1. Palaeobotany

2. Anatomy

3. Ornithology

4. Paleontology

Q. Question 5
If a round, green seeded pea plant (RR yy) is crossed with wrinkled, yellow seeded pea plant (rr YY), the seeds produced in F1 generation are

(a) round and yellow
(b) round and green
(c) wrinkled and green
(d) wrinkled and yellow​​​​​​​

Q. Difference between phenotype and genotype

Q.

How do Mendel's experiments show that traits are inherited independently?