The Chromosome Theory of Inheritance

Q. What is the importance of the MMC undergoing meiosis?

Q. Why chromosome number doesn't increase in S phase eventhough DNA gets doubled?

Q. The number of contrasting characters studied by Mendel for his experiments was:

1. 14
2. 4
3. 2
4. 7

Q.

What are non-allelic genes?

Q.

Who had proposed the chromosomal theory of the inheritance?

Q.

In his classic experiments on pea plants, Mendel did not use?

1. Seed color

2. Seed shape

3. Pod length

4. Flower position

Q.

Who discovered the gene?

Q. Which of the following characters was not chosen by Mendel in his pea plant hybridisation experiment?

1. Pod shape
2. Pod colour
3. Location of flower
4. Location of pods

Q.

Sutton and Boveri explained Mendel’s laws using ___.

1. Movement of chromosomes during cell division

2. Movement of nuclei during cell division

3. Movement of cell organelles during cell division

4. Movement of proteins during cell division

Q. How are alleles of a particular gene different from each other.Explain its significance.

Q.

Which one from those given below is the period for Mendels hybridization experiments?

1. 1856-1863

2. 1840-1850

3. 1857-1869

4. 1870-1877

Q. Gregor Mendel conducted hybridisation experiments:

1. Seven years $(1865-1872)$
2. Seven years $(1856-1863)$
3. Seven years $(1853-1860)$
4. Fourteen years $(1853-1867)$

Q. Which of the following statements is/are correct?
I. The chromosomal movement during meiosis had been worked out by 1902.
II. Mendel suggested that factors are discrete units and was able to provide physical proof for its existence.
III. Advancements in microscopy helped scientists to carefully observe cell division and discover chromosomes.

1. Statements (I) and (II) are correct, but statement (III) is incorrect
2. Statements (I) and (II) are incorrect, but statement (III) is correct
3. Statements (I) and (III) are correct, but statement (II) is incorrect
4. All statements are correct

Q.

explain the mechanism of hereditary changes

Q. What was the most significant conclusion that Mendel drew from the experiments he conducted on pea plants?

1. There is a considerable amount of variation seen in pea plant hybridisation results
2. Factors are inherited as discrete units and do not show blending
3. Genes are found on chromosomes
4. Behaviour of chromosomes is parallel to behaviour of genes

Q.

How do you know if two genes are linked together?

Q.

A nucleotide is composed of

1. Nitrogenous base + sugar + phosphate

2. Nitrogenous base + sugar

3. Nitrogenous base + phosphate

4. None of these

Q. Nucleotides are building blocks of nucleic acids. Each nucleotide is a composite molecule formed by :

1. base-sugar-phosphate
2. base-sugar-OH
3. ${(\mathrm{base}-\mathrm{sugar}-\mathrm{phosphate})}_n$
4. sugar-phosphate.

Q. Which one of the following techniques was used by Mendel for the hybridisation experiment on pea plants?
[1 mark]

1. Artificial hybridization
2. Grafting
3. Layering
4. Random mating

Q.

Of a normal couple, half the sons are haemophilic while half the daughters are carriers. The gene is located on

1. X-chromosome of father

2. Y-chromosome of father

3. one X-chromosome of mother

4. both the X-chromosomes of mother

Q.

Which is incorrect for Mendelism?

1. Works on garden pea

2. Law of segregation proved by monohybrid cross

3. Discovered linkage

4. All of the above

Q.

Which of the following technique(s) was/were used by Mendel for the hybridisation experiment on pea plants?

1. Controlled mating
2. Grafting
3. Layering
4. Both (b) and (c)

Q. What is the importance of the MMC undergoing meiosis?

Q.

The linked characters would always inherit together till they are???

Q.

Which of the following technique(s) was/were used by Mendel for the hybridisation experiment on pea plants?

1. Both (b) and (c)
2. Grafting
3. Controlled mating
4. Layering

Q.

Give scientific reason for the following:

For sexual reproduction, gametes must be produced with haploid chromosomes.

Q.

Which of the following technique(s) was/were used by Mendel for the hybridisation experiment on pea plants?

1. Grafting
2. Controlled mating
3. Both (b) and (c)
4. Layering

Q. Who among the following is the father of Indian cytology?

1. A. K. Sharma
2. Lal Singhji
3. B. P. Pal
4. P. Maheshwari

Q. This section contains 1 Matrix Match type question, which has 2 Columns (Column I and Column II). Column I has four entries (A), (B), (C) and (D), Column II has four entries (P), (Q), (R) and (S). Match the entries in Column I with the entries in Column II. Each entry in Column I may match with one or more entries in Column II.
इस खण्ड में 1 मैट्रिक्स मिलान प्रकार का प्रश्न है, जिसमें 2 कॉलम (कॉलम I तथा कॉलम II) हैं। कॉलम I में चार प्रविष्टियाँ (A), (B), (C) तथा (D) हैं, कॉलम II में चार प्रविष्टियाँ (P), (Q), (R) तथा (S) हैं। कॉलम I में दी गयी प्रविष्टियों का मिलान कॉलम II में दी गयी प्रविष्टियों के साथ कीजिए। कॉलम I में दी गयी प्रत्येक प्रविष्टि का मिलान कॉलम II में दी गयी एक या अधिक प्रविष्टियों के साथ हो सकता है।

Match the Columns and choose the appropriate answer

कॉलमों का मिलान करें और सही उत्तर चुनें

	Column I कॉलम I		Column II कॉलम II
(A)	Phenylketonuria फीनाइल कीटोनूरिया	(P)	Both unaffected parents can have affected child दोनों अप्रभावित जनकों के प्रभावित बच्चे हो सकते हैं
(B)	Sickle cell anaemia दात्र कोशिका अरक्तता	(Q)	Recessive disorder अप्रभावी विकार है
(C)	Thalassemia थैलेसीमिया	(R)	Gene is found on autosome जीन, अलिंग गुणसूत्र पर पाया जाता है
(D)	Colour-blindness वर्णांधता	(S)	Sex linked लिंग-सहलग्न होता है

1. A-PQR, B-PQR, C-PQR, D-PQS
2. A-PQS, B-PQR, C-QR, D-PS
3. A-QR, B-S, C-PR, D-PRS
4. A-P, B-RS, C-PQ, D-QR

Q. Who proposed the chromosomes theory of inheritance?