Variations

Q. List the two types of reproduction. Which one of the two is responsible for bringing more variations in its progeny and how?

Q.

The offspring formed as a result of sexual reproduction exhibit more variations because :
(a) sexual reproduction is a lengthy process
(b) the genetic material comes from two parents of different species
(c) the genetic material comes from two parents of same species
(d) the genetic material comes from many parents

Q.

Which of the processes, sexual reproduction or asexual reproduction, brings about maximum variations in the offsprings?

Q.

Variation in organisms is due to_________.

Q.

Sexual mode of reproduction results in offspring identical to the parents. Is this statement true or false?

1. True

2. False

Q.

Why is DNA copying an essential part of the process of reproduction?

Q. What is correct about DNA duplication?

1. It is the copying of the DNA of the parent cell
2. It is prone to errors which may lead to variation
3. None
4. Both

Q.

"In human cells, no biochemical reaction is accurate.” This applies to DNA replication also. What could be the possible advantageous outcome of this on DNA?

1. Genetic variation

2. Chromosome abnormality

3. Morphological variation

4. Genetic abnormality

Q.

Sexual mode of reproduction results in offsprings identical to the parents.

1. True

2. False

Q. Which of these is correct?

1. More variation arises in asexual reproduction than sexual reproduction
2. Mitosis results in variation
3. Mitosis results in more variation than meiosis
4. More variation arises in sexual reproduction than asexual reproduction

Q. Variation is useful for the survival of species overtime but the variants have unequal chances of survival

1. True
2. False

Q.

Characters that are transmitted from parents to offspring during sexual reproduction show :
(a) only similarities with parents
(b) only variations with parents
(c) both similarities and variations with parents
(d) neither similarities nor variations with parents

Q. Variations are introduced because of DNA duplication.

1. True
2. False

Q. Question 6
Characters that are transmitted from parents to offspring during reproduction show

(a) only similarities with parents
(b) only variations with parents
(c) both similarities and variations with parents
(d) neither similarities nor variations

Q. Variations are introduced because of DNA duplication.

1. True
2. False

Q.

Sexual mode of reproduction results in offsprings identical to the parents.

1. True

2. False

Q. Which of the following is incorrect about variations?

1. Variations among individuals give a species a better chance of survival
2. In sexual reproduction, variations of two individual combine to form even more variations
3. All of these
4. Every cell division may cause variations