CBSE Class 12 Biology Principles of Inheritance and Variation diagrams based questions

CBSE Class 12 Biology Principles of Inheritance and Variation diagrams based questions. There are many more useful educational material which the students can download in pdf format and use them for studies. Study material like concept maps, important and sure shot question banks, quick to learn flash cards, flow charts, mind maps, teacher notes, important formulas, past examinations question bank, important concepts taught by teachers. Students can download these useful educational material free and use them to get better marks in examinations.  Also refer to other worksheets for the same chapter and other subjects too. Use them for better understanding of the subjects.

Principles of Inheritance and Variation

5.1

Study the pedigree chart and comment whether it is
a) Autosomal or Sex linked
b) Dominant or recessive

5.2

a) What will be the Phenotype ratio in F2 generation
b) What will be the genotype ratio?
c) T and t are separated during gamete formation. What is it called?

5.3

Study the table and answer the questions:
a) Name the dominant traits
b) What was the parent genotype if the table shows F2 generation?
c) What is the F2 phenotype ratio?
Why did you get such type of ratio?

5.4

With the help of the diagram answer the following questions:
a) How many alleles are involved in blood grouping? This is an example of ________.
b) A person having AB blood group has both dominant alleles. What is the inheritance type called?
A man with 'A' blood marries a woman with 'B' blood. Can they have a child with 'O' blood group? How?

5.5

The figure shows Symbols used to prepare pedigree charts. What does the symbols A-D represent?

5.6

a) This is a karyotype of a human suffering from certain chromosomal disorder. Name the disorder.
b) Write the symptoms of the disorder.

5.7

a) This is a karyotype of a human suffering from chromosomal disorder. Name the disorder.
b) What is the cause of this disorder?
c) Write the symptoms.
d) By which name is this syndrome also known? Why?

5.8

a) Name the syndrome
b) What is the cause of this disorder
c) How many chromosomes (autosome and sex chromosome) do the patient have?

5.9

a) When chromosomes are arranged in this fashion, it is called a ________.
b) Write the sex of the person whose chromosomes are shown here.

5.10

a) The slide shows a human blood smear. What is the patient suffering from? (refer to arrows)
b) Is the disease sex linked?
c) Explain the genetic cause of this disease?
d) What is the probability of children being affected by the disease when both the parents are heterozygotes of this gene?