Inheritance

Q.

Do genetics influence behavior?

Q. Which of the following are examples of homologous organs?

1. Forelimbs of frog and bird
2. Arms of rabbit and human
3. Forelimbs of lizard and bat
4. Wings of butterfly and bird

Q. Which among the following statements are correct with respect to human evolution?

1. Human evolution can be studied from fossils
2. Humans have evolved from chimpanzees
3. All humans are a single species
4. There exists a biological basis to the notion of human races

Q. A cell having 46 chromosomes will form daughter cells having chromosomes after meiosis.

1. 92
2. 23
3. 46
4. 13

Q.

How many different phenotypes and genotypes are obtained in Mendel’s ${\text{F}}_2$ generation of dihybrid cross?

1. 4 phenotypes and 9 genotypes.
2. 4 phenotypes and 16 genotypes.
3. 16 phenotypes and 8 genotypes.
4. 2 phenotypes and 16 genotypes.

Q. The following image represents the wing of a bat and bird. Which among the following statements are correct with respect to the image?

1. The have same origin
2. They are analogous structures
3. They have same function
4. They are homologous structures

Q. The tails of male and female mice are removed surgically. They are allowed to mate to produce an offspring. The offspring however has a tail. Why did the offspring develop a tail when its parents did not have one?

1. Development of tail depends upon the environment
2. There is no change at the genetic level
3. Development of tail is a random event
4. It did not change the genes of the germ cell.

Q. Assertion [A]: Genes are the segments of DNA molecule.

Reason [R]: Genes carry information for protein synthesis.

1. [A] is true and [R] is false
2. Both [A] and [R] are true and [R] is the correct explanation for [A]
3. [R] is true and [A] is false
4. Both [A] and [R] are true but [R] is not the correct explanation for [A]

Q.

William Harvey was the scientist who

1. Proposed the laws of inheritance

2. Studied cork and gave the term ‘cell’

3. Proposed the theory of organic evolution

4. Studied blood circulation

Q.

Select the inherited characters in human beings.

1. Eye colour
2. Hair colour
3. Skin colour
4. Facial features

Q. Define inheritance and heredity.

Q.

Genes are the number of chromosomes determine the characteristics of a species. True/ False.

1. False

2. True

Q. _______ is based on the idea that more the similarities in the DNA of the organisms, more closely they are related.

1. DNA analysis
2. Fossil analysis
3. Molecular phylogeny
4. Genetics

Q.

The primary requisite (basic event) for reproduction in all living organism is ______.

1. Puberty

2. DNA Replication

3. Release of hormones

4. Protein synthesis

Q. How did we come to know about germ layers?

Q. In a population of red beetles thriving in a bush, a green variant arises. The green beetle can easily escape the crow (predator). Identify the correct statement based on this information.

1. This is an example of genetic drift
2. Colour variation always offers survival advantage
3. This is an example of natural selection
4. Green colour of the beetle is an acquired trait

Q.

Lecithin and cephalin that surround the coacervates ultimately formed the

1. Neo - Lamarckism
2. Neo - Mendelism
3. Modern Evolutionary Synthesis
4. Neo - Darwinism

Q.

How long have humans been existed?

Q. Variations are introduced because of DNA duplication.

1. False
2. True

Q. There are _____ pairs of chromosomes in human.

1. 23
2. 72
3. 100
4. 46

Q.

Question 20
The two versions of a trait (character) which are brought in by the male and female gametes are situated on

(a) copies of the same chromosome
(b) two different chromosomes
(c) sex chromosomes
(d) any chromosome

Q.

Give the biological/technical term for the following:

The transmission of characters from one generation to the successive generation.

Q.

Differentiate between the following:

Homologous organs and analogous organs

Q.

does genes havw something to do with our character and skin colour?

Q.

Write a brief note on Monogenic disorders. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> [Textbook question 5b pg no.193]

Q. is the passing on of traits from parents to their offspring through reproduction. is the basic structural and functional unit of heredity.

1. Genetics
2. Heredity
3. Gene
4. Chromosome

Q. Difference between heredity and inheritance?

Q. Which of these is correct?

1. More variation arises in asexual reproduction than sexual reproduction.
2. More variation arises in sexual reproduction than asexual reproduction.
3. Mitosis does not result in any variation.
4. Mitosis results in more variation than meiosis.

Q. Offspring of the same parent resemble one another as well as their parents, yet there are
differences among them . Give reasons