The Law of Independent Assortment

Q. The proportion of phenotypic ratio 3:1 at the $F_2$ generation is explained by the

1. Law of dominance
2. Law of segregation
3. Law of independent assortment
4. Test cross

Q. Match column-I with column-II and select the correct answer using the codes given below.
$\begin{array}{cccc}& \text{Column - I}& & \text{Column - II}\\ \text{A}& \text{ABO blood groups}& \text{I.}& \text{Dihybrid cross}\\ \text{B}& \text{Law of segregation}& \text{II.}& \text{Monohybrid cross}\\ \text{C}& \text{Law of Independent assortment}& \text{III.}& \text{Base pairs substitution}\\ \text{D}& \text{Gene mutation}& \text{IV.}& \text{Multiple allelism}\end{array}$

1. A – II; B – III; C – IV; D – I
2. A – II; B – I; C – IV; D – III
3. A – IV; B – I; C – II; D – III
4. A – IV; B – II; C – I; D – III

Q. While working on Oenothera lamarckiana or evening primrose, Hugo de Vries observed

1. that all offspring produced by this plant after selfing were of the same type
2. that the majority of offspring produced by this plant were similar to the parental type but few seemed different
3. that on selfing the mutants, all offspring produced resembled the parents
4. all of these

Q. From a cross AABb x aaBb, the genotypes AaBB : AaBb : Aabb : aabb are obtained in ratio

1. 1 : 1 : 1 : 1
2. 1 : 2 : 1 : 0
3. 0 : 3 : 1 : 0
4. 1 : 1 : 1 : 0

Q. Which of the following statement is correct with respect to law of independent assortment?

1. the alleles of two different genes will randomly get assorted during the formation of haploid cells
2. the alleles of two different genes will not get randomly assorted during the formation of haploid cells
3. the alleles of two different genes will randomly get assorted during the formation of diploid cells
4. the alleles of three different genes will not randomly get assorted during the formation of haploid cells

Q. A handsome man does not know dancing, his wife who is not good looking knows dancing. They produce a boy who is ugly and does not know dancing. What genetic principle is involved in this inheritance?

1. Law of dominance
2. Linkage
3. Sex linked inheritance
4. Law of independent assortment

Q. Linkage was first discovered by

1. Morgan and Punnett
2. Punnet and Carl Correns
3. Bateson and Punnett
4. Bateson and Morgan

Q.

What is the Law of Independent Assortment? Explain with an example?

Q. An exception (deviation) to Mendelian law of independent assortment is

1. crossing over
2. incomplete dominance
3. segregation
4. linkage

Q. Choose the correct answer from the alternatives given :
Which of the following criteria should be fulfilled by a molecule to act as a genetic material?
(i) It should be able to replicate.
(ii) It should be structurally and chemically stable.
(iii) It should be able to undergo slow mutations.
(iv) It should be able to express itself in the form of Mendelian characters.

1. (i) and (ii)
2. (ii) and (iii)
3. (i), (ii) and (iii)
4. (i), (ii), (iii) and (iv)

Q. If a character is controlled by six alleles of a gene, then the possible genotypes would be________

1. 729
2. 64
3. 21
4. 42

Q.

The hereditary principle derived from the results showing new combinations in addition to parental combinations in $F_2$ generation is

1. Law of segregation

2. Law of independent assortment

3. Law of dominance

4. Law of unit characters

Q.

Law of independent assortment is

1. Applicable to all genes on all chromosomes

2. Applicable to those genes present on the same chromosome

3. Applicable to all dominant genes only

4. Not applicable to genes present on the same chromosome

Q. Had Mendel chose to study traits on a plant that were linked, he would not have been able to put forward which of the following laws?

1. Law of Dominance
2. Law of Segregation
3. Law of Purity of gametes
4. Law of Independent Assortment

Q.

In Mendel’s experiments, the $F_1$ progeny resembles one of the two parents. The trait that is not seen is

1. Recessive

2. Dominant

3. Superior

4. Wild

Q. Multiple alleles are characterised by

1. More than two alternate forms of a gene found at same locus
2. More than two alternate forms of a gene found at different loci
3. Occurrence of one gene in two chromosomes
4. None of the above

Q. Why is the law of independent assortment not universally applicable?

Q.

Mendelian recombinations are mainly due to ___.

1. Linkage

2. Independent assortment of genes

3. Mutations

4. Dominant characters

Q. Coupling and repulsion hypothesis was given by

1. Bateson and Morgan
2. Morgan and Punnet
3. Bateson and Punnet
4. Morgan and Miller

Q. Law of independent assortment of Mendel was proved by

1. Reciprocal cross
2. Monohybrid cross
3. Back cross
4. Dihybrid cross

Q.

In Morgan's experiments on linkage, the parental types red eyed, normal wings and white eyed, miniature wings which were used for test-cross. The percentage of red eyed, normal wings and white eyed, miniature winged recombinants in F${}_2$ generation is

1. 1.3
2. 25
3. 62.8
4. 37.2
5. 98.7

Q. Presence of recessive trait is $16\%$. The frequency of dominant allele in population is

1. $0.6$
2. $0.32$
3. $0.84$
4. $0.92$

Q.

Mendelian recombinations are due to:

1. Crossing over

2. Independent assortment of genes

3. Mutations

4. Dominant characters

Q.

The hereditary principle derived from the results showing new combinations in addition to parental combinations in $F_2$ generation is

1. Law of segregation

2. Law of independent assortment

3. Law of dominance

4. Law of unit characters

Q. Determination of linkage and % of crossing over between two linked genes is important because

1. It helps in the fixation of heterosis in the organism.
2. It helps in maintaining the heterzygosity in a given population.
3. It explains coupling and repulsion.
4. None of the above.

Q.

The hereditary principle derived from the results showing new combinations in addition to parental combinations in $F_2$ generation is

1. Law of segregation

2. Law of independent assortment

3. Law of dominance

4. Law of unit characters

Q. Which of the following is exception to Mendel's laws?

1. Linkage
2. Incomplete dominance
3. Co-dominance
4. All of the above

Q. Write a short note on gene interaction

Q. In Mendelian dihybrid cross when heterozygous Round Yellow are self crossed, Round Green offsprings are represented by the genotype ___.

1. RrYy, RrYY, RRYy
2. Rryy, RRyy
3. RrYy, rryy, Rryy
4. Rryy, RRyy, rryy

Q. Select the correct statement with respect to blending theory.

1. It was a theory of belief during the Post-Mendelian era.

2. It stated that characters of parents are discrete units that do not mix in an offspring.

3. Offsprings have traits exactly like their parents.
4. Individuals inherit a smooth blend of traits from their parents.