YSA
Model Paper
Subject:
Biology
Max Marks: 65
Class:
X
Time: 2:40 Hrs
Section-C
Marks10*2=20
Attempt two questions.
Q.3
In a dihybrid cross stem length tall with purple
flower is dominant.
1.
Write genotype of dominant character.
2.
Write phenotype and genotype of recessive trait.
3.
Write genotype of ‘F1’.
4.
Why only dominant trait appeared in ‘F1’.
5.
Show punnett square to know the genotype and phenol
type of all off spring.
Q.4
a.
Write the defects which are produced due to changes
in joints. Write
causes and
symptoms.
b.
Write formation and excretion of nitrogenous waste
products.
Q.5
a.
How biological processing help in treatment of
organic Sewage?
b.
What is difference between pulmonary circulation and
systemic circulation?
c.
Write functions of master gland.
