Sardar Krushinagar Dantiwada Agricultural Uiversity 2010 Bachelor of Veterinary Science & Animal-Husbandary Semester End Practical -university exam paper

Semester End Practical exam

AGB – 211(2+1)

Marks: 25_

Q. 1. In guinea pigs rough coat is due to dominant allele 'R' and its recessive allele 'r'
produces smooth coat. A homozygous rough coat animal is mated with smooth
coat animals. (4.0)

a) What will be the appearance of F1 and F2 offspring?

b) What is probability of getting male smooth and black offspring in F2?



Q. 2. In fowl the shape of comb is governed by pairs of genes in such a way that, fowl
having rrpp genotype will show single comb, R_P _ genotype will show walnut
comb, rrP _ genotype will show pea comb and R_ pp genotype will show rose
comb. (4.0)

a) What will be the shape of comb and in what proportion in F1 and F2
generations, produced from a cross ranging from pure rose combed and pure pea
combed birds?
Q. 3. Under the assumption of complete dominance for all the gene pairs, ans the
subsequent ques. for cross ranging from Aa BB Cc X Aa Bb Cc (3.0)

i) Number of various kinds of gamates produced by every parent.

ii) Number of genotypic and phenotypic classes in progenies.

iii) Proportion of progenies representing all dominant traits.

Q. 5. Write down few outline about various stages of meiosis prophage I. (2.0)

Q. 6. A. Practical record. (3.0)
B. Viva (5.0)

Earning:   Approval pending.