Genetics and Evolution NDA Questions

NDA BIOLOGY

Genetics and Evolution MCQ Questions


13.
Turner syndrome (45, X0) is characterized by:
A.
Extra Y chromosome in males
B.
Loss of chromosome 21
C.
Monosomy of X chromosome in females
D.
Trisomy of X chromosome
😑 View Answer Rough Work Error
ANSWER :
C. Monosomy of X chromosome in females
14.
Klinefelter syndrome has the karyotype:
A.
47, XXY
B.
46, XX
C.
47, XYY
D.
45, X0
😑 View Answer Rough Work Error
ANSWER :
A. 47, XXY
15.
Which of the following is an example of co-dominance?
A.
Wrinkled seed over round seed
B.
Black coat over white coat in cattle
C.
AB blood group in ABO system
D.
Tallness over dwarfness in peas
😑 View Answer Rough Work Error
ANSWER :
C. AB blood group in ABO system
16.
In incomplete dominance, the F1 hybrid of red (RR) and white (rr) flowered plants shows:
A.
Pink flowers
B.
White flowers
C.
Purple flowers
D.
Red flowers
😑 View Answer Rough Work Error
ANSWER :
A. Pink flowers
17.
DNA double helix model was proposed by:
A.
Meselson and Stahl
B.
Watson and Crick
C.
Hershey and Chase
D.
Franklin and Wilkins
😑 View Answer Rough Work Error
ANSWER :
B. Watson and Crick
18.
The two strands of DNA double helix are held together by:
A.
Hydrogen bonds between complementary bases
B.
Covalent bonds between bases
C.
Phosphodiester bonds
D.
Ionic bonds between sugars
😑 View Answer Rough Work Error
ANSWER :
A. Hydrogen bonds between complementary bases