NEET NCERT Biology Principle inheritance online model exam,MCQs

Principles of Inheritance and Variation Mock Test-7

Question No:1

Find out the correct statement.

[A] Genetic makeup of the egg determines sex of the child in human
[B] Genetic makeup of the sperm determines sex of the child in human
[C] XO and XY type of sex determination is an example of female heterogamety
[D] Henking (1891) could trace a specific nuclear structure all through oogenesis of few insects



Question No:2

Female heterogamety is found in

[A] Human
[B] Drosophila
[C] Chicks
[D] All of the above



Question No:3

Why Mendel’s work was not recognized till 1900?

[A] His work could not be widely published.
[B] His concept of factor (stable and discrete units that control expression of trait) was not accepted by his contemporaries.
[C] His approach of using mathematics to explain biological phenomenon was totally new and unacceptable by many of the biologist of his time.
[D] All of these



Question No:4

How many scientists rediscovered mendelism in 1900 independently?

[A] 1
[B] 2
[C] 3
[D] 4



Question No:5

Mendelian rediscoverers are

[A] Devries, Holland
[B] Correns, Germany
[C] Von Tschermak, Austria
[D] All of these



Question No:6

Who noted that behaviour of chromosomes was parallel to the behaviour of genes and use chromosome movement to explain Mendel’s law?

[A] T.H. Morgan
[B] Hugo Devries
[C] Sutton and Boveri
[D] Beadle and Tatum



Question No:7

Which of the column A or B represents chromosome and which of the column represents gene?
A——————B
1. Occur in pairs—- 2. Occur in pairs
3. Segregate at the time of gamete formation such that only one of each pair is transmitted to a gamete—–4. Segregate at the time of gamete formation and only one of each pair is transmitted to a gamete
5. Independent pairs segregate independently of each other—–6. One pair segregates independently of another pair

[A] A: Gene, B: Gene
[B] A: Chromosome, B: Chromosome
[C] A: Gene, B: Chromosome
[D] A: Chromosome. B; Gene



Question No:8

Method for analyzing inheritance pattern of traits in human being is

[A] DNA finger printing
[B] Control cross
[C] Pedigree analysis
[D] All of the above



Question No:9

1:1:1:1 ratio of progenies can be obtained if the plants employed for crossing are:
(A) TTRR x ttRR
(B) TtRr x ttrr
(C) TtRR x ttrr
(D) Ttrr x ttRr

[A] A,C,D
[B] A,B, C, D
[C] B,D
[D] A, B



Question No:10

Failure of segregation of chromatids during cell division cycles results in the gain or loss of a chromosome(s) called

[A] Anenploidy
[B] Polyploidy
[C] Trisomy
[D] Nullisomy



Question No:11

Down’s syndrome occurs due to the gain in extra copy of

[A] Chromosome 19
[B] Chromosome 5
[C] Chromosome 21
[D] Chromosome 24



Question No:12

Turner’s syndrome occurs due to loss of

[A] Chromosome 5
[B] Chromosome 21
[C] Chromosome ‘X’
[D] Chromosome ‘Y’



Question No:13

How many sex chromosomes are present in human cell?

[A] 1 pair
[B] 2 pairs
[C] 3 pairs
[D] 4 pairs



Question No:14

Gynaecomastia is seen in case of

[A] Down’s syndrome
[B] Klinefelter’s syndrome
[C] Turner’s syndrome
[D] All of these



Question No:15

Following features belong to which syndrome?
(A) Furrowed tongue
(B) Palm is broad with characteristic palm crease
(C) Physical, psychomotor and mental retardation
(D) Short statured with small round head

[A] Down’s syndrome
[B] AIDS
[C] Turner’s syndrome
[D] Klinefelter’s syndrome