1
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following approaches does not give the defined action of contraceptive ?
A
Intra uterine devices $$ \to $$ Increase phagocytosis of sperms, suppress sperm motility and fertilizing capacity of sperm
B
Barrier methods $$ \to $$ Prevent fertilization
C
Hormonal contraceptives $$ \to $$ Prevent/retard entry of sperm, prevent ovulation and fertilization
D
Vasectomy $$ \to $$ Prevents spermatogenesis
2
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language
In a testcross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant-typeoffspring. This indicates
A
Both of the characters are controlled by more than one gene
B
The two genes are linked and present on the same chromosome
C
The two genes are located on two different chromosomes
D
Chromosomes failed to separate during meiosis
3
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language
Match the terms in Column-I with their description in Column-II and choose the correct option :
Column-I Column-II
(a) Dominance (i) Many genes govern a single character
(b) Codominance (ii) In a heterozygous organism only one allele expresses
itself
(c) Pleiotropy (iii) In a heterozygous organism both alleles express
themselves fully
(d) Polygenic inheritance (iv) A single gene influences many characters
A
(a) - (ii), (b) - (iii), (c) - (iv), (d) - (i)
B
(a) - (iv), (b) - (i), (c) - (ii), (d) - (iii)
C
(a) - (ii), (b) - (ii), (c) - (iv), (d) - (iii)
D
(a) - (iv), (b) - (iii), (c) - (i), (d) - (ii)
4
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language
A cell at telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at telophase stage. There is no formation of cell plate and thus the cell is contaning more number of chromosomes as compared to other dividing cells. This would results in -
A
Polyteny
B
Aneuploidy
C
Polyploidy
D
Somaclonal variation
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