Reference no: EM131090959
1. Mendel was born in
(A) Austria (B) Germany
(C) Britain (D) Czechoslovakia
2. Mendel studied seven contrasting characters for his breeding experiment with Pisum sativum, which of the following character did he not use?
(A) Pod colour (B) Pod shape
(C) Leaf shape (D) Plant height
3. Genotype means
(A) genetic composition of the individual
(B) genetic composition of the germ cell
(C) genetic composition of plastids
(D) genetic composition of an organ
4. The physical manifestation of an organism genes is its
(A) environment (B) phenotype
(C) genetic code (D) genotype
5. An organism with two identical alleles of a gene in a cell is called
(A) homozygous (B) dominant
(C) heterozygous (D) hybrid
6. When an individual is having both the alleles of contrasting characters it is said to be
(A) heterozygous (B) dioecious
(C) monoecious (D) linked genes
7. When an allele fails to express itself in F1 generation in the presence of other allele, the former is said to be
(A) recessive (B) codominant
(C) complementary (D) epistatic
8. Alleles are
(A) homologous chromosome
(B) chromosome that have crossed over
(C) alternate forms of gene
(D) linked genes
9. Mendel’s laws apply only when
(A) F1 in monohybrid cross shows two types of individuals
(B) the character are linked
(C) parents are pure breeding
(D) first pair of contrasting character is dependent upon other pairs
10. Which of Mendel’s procedures differed from those of his predecessor and contributed most of his success?
(A) He observed many characteristics of each trait
(B) He observed distinct inherited traits
(C) He quantitatively analysed his data
(D) He kept breeding records
11. If a plant is heterozygous for tallness, the F2 generation has both tall and dwarf plants. This proves the principle of
(A) dominance
(B) segregation
(C) independent assortment
(D) incomplete dominance
12. The genotypic ratio in F2 generation of monohybrid cross will be
(A) 1 : 2 : 1 (B) 3 : 1
(C) 1 : 1 (D) 1 : 2
13. The results of a test cross reveal that all the offspring resemble the parent being tested. This parent must be
(A) heterozygous (B) homozygous
(C) recessive (D) haploid
14. Chromosome theory of heredity was postulated by
(A) Charles Darwin
(B) Gregor Mendel
(C) Sutton and Boveri
(D) Har Govind Khorana
15. Allosomes are
(A) bead like structures (B) on chromosomes
(C) sex chromosomes (D) rounded blocks
16. Escherichia coli is widely used in genetics research because it is
(A) easy to produce
(B) easily manipulated
(C) easy to handle
(D) easy to culture in laboratory
17. Which one of the following mutations is not hereditary?
(A) Gametic (B) Zygotic
(C) Somatic (D) Genetic
18. Recessive mutation are expressed normally in
(A) has to express always since it is a mutation
(B) heterozygous condition
(C) neither in homozygous nor in heterozygous condition
(D) homozygous condition
19. Mutations are generally
(A) recessive (B) codominant
(C) incompletely dominant (D) dominant
20. Which of the following is a mutagen?
(A) SO2 (B) CO2
(C) CO (D) HNO2