ST BRITTOS MATRIC HR SEC SCHOOL
MONTHLY TEST
SUBJECT – BIOLOGY
MAX MARKS 75
PART A – BIO-BOTANY
I FILL IN THE BLANKS
5 X 1 =5
1. The dihybrid test cross ratio is----2. The pairs of contrasting character traits of Mendel are
called----3. The functional unit of a gene which can synthesize one
polypeptide is called-----4. The chromosomal basis of inheritance was given by ---5. Moist vapour theory was given by----II ANSWER IN THREE LINES
4 X 3 =12
6. Define pangenes
7. What do you mean by back cross? Give example
8. Define epistasis
9. What is called homunculus?
III ANSWER BRIEFLY [ ANY TWO ]
2 X 5 = 10
10. Describe monohybrid cross
11. Explain the molecular structure of a gene
12.Differentiate between dominance and epistasis
IV ANSWER IN DETAIL FOR ANY ONE
1 X 10 =10
13.Explain inheritance of fruit colour in Cucurbita pepo
14.List the important feature of gene concept