In this article you will get the clue that from where and how the questions are being framed from the chapter Principles of Inheritance and Variation
The experts of jagranjosh.com have full confidence that you will not miss any of the questions in the board exam as well as in competitive exams from this chapter if you will keep the following terms / question in your mind while studying.
What is factor?
What are traits?
What is allelomorph?
Reason for selecting Pisum sativum
Dominant and recessive traits for all the seven characters
Law of purity of gametes (phenotypic and genotypic ratios)
Law of new combination / law of independent assortment (phenotypic and genotypic ratios)
Back cross and test cross with definition (mono hybrid and dihybrid both)
Genotypic and phenotypic ratios of both back cross and test cross (mono hybrid and dihybrid)
Calculation of gametes in
- Mohybrid cross
- Dihybrid cross
- Trihybrid cross
Modification in Mendel’s` monohybrid cross ratio and dihybrid cross ratio
Incomplete and co-dominance with cross diagram (phenotypic and genotypic ratios)
Lethal genes (phenotypic and genotypic ratios)
How 9:3:3:1 ratio gets modified in Incomplete and co-dominance
Concept of multiple alleles
Numbers of alleles which are present in the ABO blood group gene
What are pseudo alleles?
Contribution of T.H. Morgan in genetics
Difference between linkage and crossing over with diagram
Child and parents blood group related problems
Pedigree analysis and its significance
Sex determination in human beings
What is Barr body?
Point mutation wit example
Chromosomal theory of the inheritance?
Polyploidy and aneuploidy
Number of chromosomes in different types of syndrome
Q1. A male’s genotype is AaBBCCddEeFF. What fraction of the sperm cells produced by this individual will carry the dominant A allele, the dominant C allele and the recessive e allele?
Q2. A pure-breeding, tall pea plant is crossed with a pure-breeding, short pea plant. All of the offspring of this cross are tall.
- Which allele is dominant, and how do you know?
- What are the genotypes of these offspring?
- Suppose two of these offspring are crossed and produce 1000 offspring. How many tall and how many short plants will you expect?
- How many of each genotype would you expect among the 1000 offspring?
Q3. 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.
Q4. A diploid organism is heterozygous for 4 loci, how many types of gametes can be produced?
Q6. A garden pea plant produced axial white flowers. Another of the same species produced terminal violet flowers. Identify the dominant traits.
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