Biology · Textbook solutions

Principles of Inheritance and Variation

Every solved example, exercise, and miscellaneous question, in the order the textbook teaches them. · 20 questions

Exercises

20 q

Ex 4 Q1 $Mention the advantages of selecting pea plant for experiment by Mendel.$
Differentiate between the following –
Ex 4 Q2 (a) $Dominance and Recessive$
Ex 4 Q2 (b) $Homozygous and Heterozygous$
Ex 4 Q2 (c) $Monohybrid and Dihybrid.$
Ex 4 Q3 $A diploid organism is heterozygous for 4 loci, how many types of gametes can be produced?$
Ex 4 Q4 $Explain the Law of Dominance using a monohybrid cross.$
Ex 4 Q5 $Define and design a test-cross.$
Ex 4 Q6 $Using a Punnett Square, workout the distribution of phenotypic features in the first filial generation after a cross between a homozygous female and a heterozygous male for a single locus.$
When a cross in made between tall plant with yellow seeds (TtYy) and tall plant with green seed (Ttyy), what proportions of phenotype in the offspring could be expected to be
Ex 4 Q7 (a) $tall and green.$
Ex 4 Q7 (b) $dwarf and green.$
Ex 4 Q8 $\text{F}_1$
Ex 4 Q9 $Briefly mention the contribution of T.H. Morgan in genetics.$
Ex 4 Q10 $What is pedigree analysis? Suggest how such an analysis, can be useful.$
Ex 4 Q11 $How is sex determined in human beings?$
Ex 4 Q12 $A child has blood group O. If the father has blood group A and mother blood group B, work out the genotypes of the parents and the possible genotypes of the other offsprings.$
Explain the following terms with example
Ex 4 Q13 (a) $Co-dominance$
Ex 4 Q13 (b) $Incomplete dominance$
Ex 4 Q14 $What is point mutation? Give one example.$
Ex 4 Q15 $Who had proposed the chromosomal theory of the inheritance?$
Ex 4 Q16 $Mention any two autosomal genetic disorders with their symptoms.$