NEET Exam  >  NEET Tests  >  Biology Class 12  >  Test: Inheritance of Two Genes (NCERT) - NEET MCQ

Test: Inheritance of Two Genes (NCERT) - NEET MCQ


Test Description

15 Questions MCQ Test Biology Class 12 - Test: Inheritance of Two Genes (NCERT)

Test: Inheritance of Two Genes (NCERT) for NEET 2024 is part of Biology Class 12 preparation. The Test: Inheritance of Two Genes (NCERT) questions and answers have been prepared according to the NEET exam syllabus.The Test: Inheritance of Two Genes (NCERT) MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Inheritance of Two Genes (NCERT) below.
Solutions of Test: Inheritance of Two Genes (NCERT) questions in English are available as part of our Biology Class 12 for NEET & Test: Inheritance of Two Genes (NCERT) solutions in Hindi for Biology Class 12 course. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free. Attempt Test: Inheritance of Two Genes (NCERT) | 15 questions in 15 minutes | Mock test for NEET preparation | Free important questions MCQ to study Biology Class 12 for NEET Exam | Download free PDF with solutions
Test: Inheritance of Two Genes (NCERT) - Question 1

"When two pairs of traits are combined in a hybrid, segregation of one pair of characters is independent of the other pair of characters is independent of the other pair of characters." The statement is independent of the other pair of characters. The statement explains which of the following laws/principles of Mendel?

Detailed Solution for Test: Inheritance of Two Genes (NCERT) - Question 1

Cross involving two contrasting character is called dihybrid cross or a two factor cross. The two factors of each trait assort at random and independent of the factors of other traits at the time of meiosis (gametogenesis) and get randomly as well as independently rearranged in the offspring producing both parental and new combinations of traits. This forms the basis of the law of independent assortment given by Mendel.

Test: Inheritance of Two Genes (NCERT) - Question 2

Match column -I with column-ii and select the correct option from the codes given below

Detailed Solution for Test: Inheritance of Two Genes (NCERT) - Question 2

A. Dihybrid test cross - The typical phenotypic ratio resulting from a dihybrid test cross, where two traits are considered, is 9:3:3:1. Therefore, A matches with (i).

B. Law of segregation - This law states that allele pairs segregate during gamete formation, and randomly unite at fertilization. It doesn't directly relate to the phenotypic ratios or the concepts of dihybrid cross, purity of gametes, or multiple alleles. However, it can be associated with the purity of gametes because segregation ensures that each gamete carries only one allele for each gene. So, B matches with (iv).

C. Law of independent assortment - This law states that genes for different traits can segregate independently during the formation of gametes. This is usually illustrated with a 1:1:1:1 phenotypic ratio in the case of a test cross involving two different traits. So, C matches with (iii).

D. ABO blood group in man - The ABO blood group system in humans is an example of multiple alleles because there are three alleles involved: So, D matches with (v).

Therefore, the correct matches would be:

  • A - (i)
  • B - (iv)
  • C - (iii)
  • D - (v)
1 Crore+ students have signed up on EduRev. Have you? Download the App
Test: Inheritance of Two Genes (NCERT) - Question 3

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

Detailed Solution for Test: Inheritance of Two Genes (NCERT) - Question 3

A typical Mendelian dihybrid cross between yellow round (dominant) and green wrinkled (recessive plants) can be represented as follows:

Thus, round green (green round) offsprings are represented by genotypes yyRR and yyRr (or RRyy and Rryy).

Test: Inheritance of Two Genes (NCERT) - Question 4

A man having the genotype EEFfGgHH can produce P number of genetically different sperms, and a woman of genotype liLLMmNn can generate Q number of genetically different eggs. Determine the values P and Q.

Detailed Solution for Test: Inheritance of Two Genes (NCERT) - Question 4

Types of gametes = 2n, where n is number of heterozygous loci. Thus, man will produe 2= 4 types of gametes and woman will produce 2= 8 types of gametes.

Test: Inheritance of Two Genes (NCERT) - Question 5

When a cross is made between a tall plant with yellow seeds (Tt Yy) and a tall plant with green seeds (Tt yy), what is true regarding the proportions of phenotypes of the offsprings in F1 generation?

Detailed Solution for Test: Inheritance of Two Genes (NCERT) - Question 5

A cross between a tall plant with yellow seeds (TtYy) and a tall plant with green seeds (Ttyy) will be:

Pnenotypic ratio is
Tall and yellow : Tall and green : Dwarf and yellow : Dwarf and green :: 3 : 3: 1: 1 or 3/8, 3/8,1/8,1/8.

Test: Inheritance of Two Genes (NCERT) - Question 6

Refer the given statements and select the correct option,
(i) Percentage of homozygous dominant individuals obtained by selfing Aa individuals is 25%.
(ii) Types of genetically different gametes produced by genotype AABbcc are 2.
(iii) Phenotypic ratio of monohybrid F2 progeny in case of Mirabilis jalapa is 3:1.

Detailed Solution for Test: Inheritance of Two Genes (NCERT) - Question 6

The phenotypic ratio of monohybrid F2 generation in case of Mirabilis jalapa is 1 Red : 2 Pink : 1 White, due to incomplete dominance.

Test: Inheritance of Two Genes (NCERT) - Question 7

Law of independent assortment can be explained with the help of

Detailed Solution for Test: Inheritance of Two Genes (NCERT) - Question 7

The law of independent assortment applies only to factor or genes present on different pairs or distantly on the same chromosome or pairs of homologous chromosomes. The principle or law of independent assortment can be studied by means of dihybrid cross, e.g., between pure breeding pea plants having yellow round seeds (YYRR) and pure breeding pea plants having green wrinkled seeds (yyrr).

Test: Inheritance of Two Genes (NCERT) - Question 8

The percentage of ab gamete produced by AaBb parent will be

Detailed Solution for Test: Inheritance of Two Genes (NCERT) - Question 8

Gametes produced by AaBb parent would be 25 % AB, 25 % aB, 25 % Ab and 25 % ab.

Test: Inheritance of Two Genes (NCERT) - Question 9

The given Punnett's square represents the pattern of inheritance in a dihybrid cross where yellow (Y) and round (R) seed condition is dominant over white (y) and wrinkled (r) seed condition.

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

Detailed Solution for Test: Inheritance of Two Genes (NCERT) - Question 9

Plant H is formed by fusion of gametes yR and YR and hence has the genotype YyRR. Plant N is formed by fusion of gametes YR and yR and hence will have the same genotype as plant N i.e., YyRR.

Test: Inheritance of Two Genes (NCERT) - Question 10

In maize, coloured endosperm (C) is dominant over colourless (c); and full endosperm (R) is dominant over shrunken (r). When a dihybrid of Fgeneration were test crossed, it produced four phenotypes in the following percentage:

Coloured full 48%, Coloured shrunken 5%,
Colourless full 7%, and Colourless shrunken 40%.

From this data, what will be the distance between two non-allelic genes?

Detailed Solution for Test: Inheritance of Two Genes (NCERT) - Question 10

Given that recombination percentage is 7% and 5%, therefore, total recombinants would be 7 + 5 = 12%. It is known that one map unit is the distance that yields 1% recombinant chromosomes. Hence the distance between two non-allelic genes is 12 map units. 

Test: Inheritance of Two Genes (NCERT) - Question 11

What proportion of the offsprings obtained from cross AABBCC x AaBbCc will be completely heterozygous for all the genes segregated independently?

Detailed Solution for Test: Inheritance of Two Genes (NCERT) - Question 11

Since one parent is homozygous AABBCC  the genotype formed will be only 1 type i.e. ABC. The other parent is heterozygous for all genes. About 1/8th or 12.5% of total offspring will be heterozygous at all three-locus.

Test: Inheritance of Two Genes (NCERT) - Question 12

True-breeding red-eyed Drosophila flies with plain thoraxes were crossed with pink-eyed flies with striped thoraxes

Red eye plain thorax × Pink eye striped thorax

The F1 flies were then test crossed against the double recessive.
The following F2 generation resulted from the cross:

What percentage number of recombinants resulted from the test cross ?

Detailed Solution for Test: Inheritance of Two Genes (NCERT) - Question 12

Recombinants obtained from the cross are 16 red eye striped thorax flies and 12 pink eye plain thorax flies.

Total number of flies =200

Total number of recombinants =28

Therefore, percentage of recombinants 

Test: Inheritance of Two Genes (NCERT) - Question 13

Mendel law of independent assortment does not hold true for the genes that are located closely on

Detailed Solution for Test: Inheritance of Two Genes (NCERT) - Question 13

As per linkage experiments carried out by Morgan, the two linked genes do not always segregate independently of each other and F2 ratio deviated very significantly from 9:3:3:1 ratio (expected when two genes are independent). Hence, if linkage was known at the time of Mendel, he would riot have been able to explain law of independent assortment.

Test: Inheritance of Two Genes (NCERT) - Question 14

Read the given paragraph to answer
In a certain plant, yellow fruit colour (Y) is dominant to green fruit colour (y) and round shape (R) is dominant to oval shape (r). The two genes involved are located on different chromosomes.

Which of the following will result when plant YyRr is self-pollinated?

Detailed Solution for Test: Inheritance of Two Genes (NCERT) - Question 14

When plant YyRr is self pollinated, 9:3:3:1 ratio of phenotypes will be observed.

Test: Inheritance of Two Genes (NCERT) - Question 15

Read the given paragraph to answer
In a certain plant, yellow fruit colour (Y) is dominant to green fruit colour (y) and round shape (R) is dominant to oval shape (r). The two genes involved are located on different chromosomes.

Which of the following is correct for the condition when plant YyRr is back crossed with the double recessive parent?

Detailed Solution for Test: Inheritance of Two Genes (NCERT) - Question 15

When YyRr is crossed with double recessive parent then genotypic and phenotypic ratio will be 1:1:1:1

Phenotypic ratio = 1 yellow round : 1 yellow oval : 1 green round : 1 green and oval. This represent a test cross.

122 videos|311 docs|196 tests
Information about Test: Inheritance of Two Genes (NCERT) Page
In this test you can find the Exam questions for Test: Inheritance of Two Genes (NCERT) solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Inheritance of Two Genes (NCERT), EduRev gives you an ample number of Online tests for practice

Up next

122 videos|311 docs|196 tests
Download as PDF

Up next