Sardar Krushinagar Dantiwada Agricultural Uiversity 2011 Bachelor of Veterinary Science & Animal-Husbandary Semester End Practical -university exam paper
Semester End Internal Practical examination
PRINCIPLES OF GENETICS AND POPULATION GENETICS
(AGB-121: 2+1=3) Marks: 20.00
Q. 1. Write chromosome numbers obtained in somatic cells of Swamp Buffalo, Fowl,
Bitch, Ass and Camel. (1.5)
Q. 2. The female with pure dumpy wing, cinnabar eyes (dp cn) were crossed with male
of normal wing, red eyes (+ +) and the F1 flies were back cross to produce
subsequent progenies:
Dumpy cinnabar – 130, Dumpy red – 28, Normal cinnabar-22, Normal red - 120
Test, whether 2 gene pairs assort independently or not? If, not, obtain out the
reason for the identical. (4.0)
Q. 3. In cattle polled condition (P) is dominant over horned (p) condition. A carrier
polled cow is mated to a horned bull.
a) What will be the appearance of offspring?
b) What is the probability of getting horn male calf? (2.0)
Q. 4. Under assumption of complete dominance for all gene pairs, ans the ques.
for Aa bb CC Dd Ee FF x Aa BB cc Dd Ee Ff cross.
a) No. of various kinds of gametes produced by every parent.
b) Proportion of progenies expressing all dominant traits.
c) Proportion of progenies which will breed true? (3.0)
Q. 5. In poultry white feathers may be the outcome of recessive genes b and/or O in
homozygous state. The presence of both dominant genes is necessary for
feather colour. The White Silkie breed has bbOO genotype. The White Wyandotte
breed has genotype BBoo. What would be the appearance of F1 and F2 generation
chickens from a cross ranging from these 2 breeds? (2.0)
Q. 6. A dad belongs to blood group AB and mother belongs to blood group O. They
have 4 children belonging to blood groups AB, B, O and A. 1 of these
children is adopted and a different child is from an earlier wedding of the mother.
State which is adopted child and which is from earlier wedding and Why? (2.0)
Q. 7. Practical Record (1.5)
Q. 8. Viva voce (4.0)
Sardarkrushinagar Dantiwada Agricultural University,
Sardarkrushinagar 385506
Semester End Internal Practical Exam
PRINCIPLES OF GENETICS AND POPULATION GENETICS
(AGB-121: 2+1=3)
Marks: 20.00
Q. 1. Write
chromosome numbers found in somatic cells of Swamp Buffalo, Fowl,
Bitch, Ass and Camel.
(1.5)
Q. 2. The
female with pure dumpy wing, cinnabar eyes (dp cn) were crossed with male
of normal wing, red eyes (+ +) and the F1 flies were back
cross to produce
following progenies:
Dumpy cinnabar 130, Dumpy red 28, Normal cinnabar-22, Normal red - 120
Test, whether two gene pairs assort independently or not? If, not, find out the
cause for the
same.
(4.0)
Q. 3. In
cattle polled condition (P) is dominant over horned (p) condition. A carrier
polled cow is mated to a horned bull.
a) What will be the appearance of offspring?
b) What is the probability of getting horn male calf? (2.0)
Q. 4. Under
assumption of complete dominance for all gene pairs, answer the questions
for Aa bb CC Dd Ee FF x Aa BB cc Dd Ee Ff cross.
a)No. of different types of gametes produced by each parent.
b) Proportion of progenies expressing all dominant traits.
c)Proportion of progenies which will breed true? (3.0)
Q. 5. In
poultry white feathers may be the result of recessive genes b and/or O in
homozygous state. The presence of both dominant genes is necessary
for
feather colour. The White Silkie breed has bbOO genotype. The White
Wyandotte
breed has genotype BBoo. What would be the appearance of F1
and F2 generation
chickens from a cross between these two
breeds? (2.0)
Q.
6. A father belongs to blood group AB and mother belongs to blood group O.
They
have four children belonging to blood groups AB, B, O and A. One of these
children is adopted and another child is from an earlier marriage of the
mother.
State which is adopted child and which is from earlier marriage and Why?
(2.0)
Q. 7. Practical Record (1.5)
Q. 8. Viva voce (4.0)
| Earning: Approval pending. |
