21. Phenotype represents
A. Morphology
B. Physiology
C. Genetics
D. None of these
22. During test cross, if all offsprings are phenotypically dominant then parents are
A. Homozygous
B. Heterozygous
C. One homozygous other heterozygous
D. None of these
23. True breeding variety is produced by
A. Self-fertilization
B. Cross-fertilization
C. Both of these
D. None of these
24. Genotype ratio of Mendel’s law of independent assortment is
A. 3:(a)
B. 1:02:01
C. 9:3:3:(a)
D. None of these
25. Which of the following is universal donor?
A. A-
B. B-
C. AB-
D. O-
26. Such inheritance in which traits vary quantitatively is
A. Continuously varying trait
B. Incomplete dominance
C. Test cross
D. Polygenic inheritance
27. Inheritance in man is traced by
A. Mathematical method
B. Genetic method
C. Statistical method
D. Pedigree method
28. Skin color in man is controlled by
A. 1 pair
B. 2 pairs
C. 4 pairs
D. 8 pairs
29. Feature correct to O-negative blood group
A. A, B antigen present
B. Anti-A, Anti-B antibody present
C. Rh antigen present
D. Rh antibody present
30. Which of the following blood group is always heterozygous?
A. A
B. B
C. AB
D. O
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