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
Principles of Inheritance and Variation Mock Test-7
CategoriesNEET Biology