Heredity and Variation Set 2 MCQs

Q1 | ) First generation after a cross is

First filial generation

F1 gneratioon

Second filial generation

Both (A) and (B)

cessive

Q2 | ) In humans , height shows a lot of variation . It is an example of

Multiple alleles

Pleiotropic inheritance

polygenic inheritance

False allelic inheritance

cessive

Q3 | Meiosis produce 4 daughter cells but each daughter cell differ from one another because of

Crossing over

Independent assortment

Change in chromosome number

Both A & B

cessive

Q4 | In T. H. Morgan"s Experiment on Drosophilia what will be the result when F1 female flies are crossed with double recessive male files ?

83% parental combinations 17% Recombinations

41.5 % parental combinations 58.5% recombinations

60% parental combinations 40 % recombinations

90 % parental combinations 10% Recombinations

cessive

Q5 | which cross yielded a ratio of 7:1 :1:7 ?

Test cross (Dihybrid) - Bateson and punnet

Test cross (Monohybrid) - Bateson and punnet

Test cross (Dihybri

#NAME?

cessive

Q6 | When there is no Possibility of independent assortment of genes during gametogenesis then What Will be the real ratio of F2 in dihybrd cross?

9 : 3 : 3 : 1

11 : 1 : 1 : 3

12 : 1 : 1 : 2

9 : 3 : 2 : 2

cessive

Q7 | What is incorrect statement Gynandromorphs ?

Individuals who show male characters and female characters

Individuals who show only female characters

It happens due to less of X- chromosomes

It happens due to binacleated eggs

cessive

Q8 | What is Barr body ?

One more than the number of X - chromosomes

One more than the number of Y-chromosomes

One less than the number of X - chromosomes

Two less than the number of X - chromosomes

cessive

Q9 | What is called Free martin ?

Sterile male born along with a fertile female

Sterile intersex born along with a fertile female

Sterile super male born along with a intersex

Sterile female born along with a fertile male

cessive

Q10 | Out of the following , Find out the reason for occurrence of free martin in cattles ?

Both the twins are connected by a common umbilical cord

Gonad of the male develop earlier then those of the female

Male hormones reach the female embryo and influence the development of male sex in the female embryo

All of the above

cessive

Q11 | In this group of plants male is heterogametic and female is homogametic type

Gymnosperms

Bryophytes

pteridophytes

angiosperms

cessive

Q12 | Name the Plant possessing two X chromosomes

Humulus japanic

Dioscoria sinulate

Flagellaria

Both (A) & (B)

cessive

Q13 | State the mutant gene Which converts the male flowers into female flowers In Maize plant

TA TA

ta ta

TA Ta

Both (A) &(C)

cessive

Q14 | By which gene sex is determind in Spinach ?

Single gene "m" located in the X- chromosome

Single gene "m" located in the Y- chromosome

Single gene "t" located in the X- chromosome

Single gene "t" located in the Y- chromosome

cessive

Q15 | Which factor in nature causes discontinuous Variation in a population ?

Recombination

Shufflng of parental genes

Mutation

Geneflow

cessive

Q16 | This is reversal of mutation

Spontneous mutation

Zygotic mutation

Back mutation

Recessive mutation

cessive

Q17 | Which condition among the following is lethal ?

(2n-2)

(2n +2)

(2n +1)

(2n- 1)

cessive

Q18 | State the cause of Philadelphia syndrome

Deletion from the long arm of chromosome number 20

Duplication in long arm of chromosome number 20

Deletion from the long arm of chromosome number 22

Deletion from the short arm of chromosome number 22

cessive

Q19 | which statement is incorrect regarding gene mutation

Mutations may be gradual or they may not be induced.

Mutation is an evolutionary agent

Any gene can undergo mutation

Mutated gene is harmful to the individual

cessive

Q20 | What happens to excessive phenylalanine accumulation in the blood of phenylketonuria patient ?

Get deposited on synovial membrane

excreted in urine

Get deposited in storage organs

All of the above

cessive

Q21 | Name the enzyme needed for the following biochemical reaction Tyrosine ???? enzyme Melanin

Melanase

tyrosinase

Tyrosine aminase

transaminase

cessive

Q22 | Which is very common method to study Human Karyotype ?

Blood culture method

Tissue culture method

Pedigree method

Statistical method

cessive

Q23 | Name the disorder caused by trisomy of sex chromosomes.

Down’s syndrome

Kline felter’s syndrome

Turner’s syndrome

Edward’s syndrome

cessive

Q24 | Match the following :-_ans_key_Column I Column II_ans_key_1. Genetics a. Father of genetics_ans_key_2. W.Bateson b. To become_ans_key_3. "Gen" c. Coined the term genetics_ans_key_4. Gregor Johann Mendel d. Study of heredity

(1 - d) (2 - c) (3 - a) (4 - b)

(1 - d) (2 - a) (3 - c) (4 - b)

(1 -

(2 - C) (3 - b) (4 - a)

cessive

Q25 | Match the following_ans_key_Column I Column II_ans_key_1. Johansen a. Coined the term gene_ans_key_2. Mendel b. Crossing over in drosophila_ans_key_3. T. H. Morgan c. Linkage in lathyrus odoratus_ans_key_4. Bateson & punnett d. Law of segregation

(1 - d) (2 - c) (3 -

(4 - a) (B) (1 - a) (2 - d) (3 - b) (4 - c)

(1 - c) (2 -

(3 - b) (4 - a) (D) (1 - b) (2 - d) (3 - a) (4 - c)

cessive