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Balbharati solutions for Biology 12th Standard HSC for Maharashtra State Board chapter 3 - Inheritance and Variation [Latest edition]

Chapters

Balbharati solutions for Biology 12th Standard HSC for Maharashtra State Board chapter 3 - Inheritance and Variation - Shaalaa.com
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Chapter 3: Inheritance and Variation

Exercises
Exercises [Pages 68 - 69]

Balbharati solutions for Biology 12th Standard HSC for Maharashtra State Board Chapter 3 Inheritance and Variation Exercises [Pages 68 - 69]

Exercises | Q 1.1 | Page 68

Multiple choice question.

Phenotypic ratio of incomplete dominance in Mirabilis jalapa.

  • 2 : 1 : 1

  • 1 : 2 : 1

  • 3 : 1

  • 2 : 2

Exercises | Q 1.2 | Page 68

Multiple choice question.

In a dihybrid cross, F2 generation offsprings show four different phenotypes while the genotypes are _______.

  • six

  • nine

  • eight

  • sixteen

Exercises | Q 1.3 | Page 68

Multiple choice question.

A cross between an individual with an unknown genotype for a trait with recessive plant for that trait is _______.

  • back cross

  • reciprocal cross

  • monohybrid cross

  • test cross

Exercises | Q 1.4 | Page 68

Multiple choice question.

When phenotypic and genotypic ratios are the same, then it is an example of _______.

  • incomplete dominance

  • complete dominance

  • multiple alleles

  • cytoplasmic inheritance

Exercises | Q 1.5 | Page 68

Multiple choice question.

If the centromere is situated near the end of the chromosome, the chromosome is called ______.

  • metacentric

  • acrocentric

  • sub-metacentric

  • telocentric

Exercises | Q 1.6 | Page 68

Multiple choice question.

Chromosomal theory of inheritance was proposed by _______.

  • Sutton and Boveri

  • Watson and Crick

  • Miller and Urey

  • Oparin and Halden

Exercises | Q 1.7 | Page 68

Multiple choice question.

If the genes are located in a chromosome as p-q-r-s-t, which of the following gene pairs will have the least probability of being inherited together?

  • p and q

  • r and s

  • s and t

  • p and s

Exercises | Q 1.8 | Page 68

Multiple choice question.

Find the mismatch pair:

  • Down’s syndrome = 44 + XY

  • Turner’s syndrome = 44 + XO

  • Klinefelter syndrome = 44 + XXY

  • Super female = 44 + XXX

Exercises | Q 1.9 | Page 68

Multiple choice question.

A colour-blind man marries a woman, who is homozygous for normal colour vision, the probability of their son being colour blind is –

  • 0%

  • 25%

  • 50%

  • 100%

Exercises | Q 2.1 | Page 68

Explain the statement of

Test cross is back cross but back cross is not necessarily a test cross.

Exercises | Q 2.1 | Page 68

Explain the statement of

Law of dominance is not universal.

Exercises | Q 2.2 | Page 68

Very Short Answer Questions.

Define dihybrid cross

Exercises | Q 2.2 | Page 68

Define the following:

Homozygous

Exercises | Q 2.2 | Page 68

Define the following:

Heterozygous

Exercises | Q 2.2 | Page 68

Define the following:

test cross.

Exercises | Q 2.3 | Page 68

Very Short Answer Question.

What is allosome?

Exercises | Q 2.4 | Page 68

Very Short Answer Question.

What is crossing over?

Exercises | Q 2.5 | Page 68

Very Short Answer Question.

Give one example of the autosomal recessive disorder.

Exercises | Q 2.6 | Page 68

Very Short Answer Question.

What are X-linked genes?

Exercises | Q 2.7 | Page 68

Very Short Answer Question.

What are holandric traits?

Exercises | Q 2.8 | Page 68

Very Short Answer Question.

Give an example of a chromosomal disorder caused due to nondisjunction of autosomes.

Exercises | Q 2.9 | Page 68

Very Short Answer Question.

Give one example of complete sex linkage?

Exercises | Q 3.01 | Page 68

Short Answer Question.

Enlist seven traits of pea plant selected/ studied by Mendel.

Exercises | Q 3.02 | Page 68

Short Answer Question.

Why law of segregation is also called the law of purity of gametes?

Exercises | Q 3.03 | Page 68

Short Answer Question.

Write a note on pleiotropy.

Exercises | Q 3.04 | Page 68

Short Answer Question.

What are the reasons for Mendel’s success?

Exercises | Q 3.05 | Page 69

Short Answer Question.

“Father is responsible for determination of sex of child and not the mother”. Justify.

Exercises | Q 3.06 | Page 69

Short Answer Question.

What is a linkage? How many linkage groups do occur in human being?

Exercises | Q 3.07 | Page 69

Short Answer Question.

Write note on –PKU.

Exercises | Q 3.08 | Page 69

Short Answer Question.

Compare X chromosome and Y chromosome.

Exercises | Q 3.09 | Page 69

Short Answer Question.

Explain the chromosomal theory of inheritance.

Exercises | Q 3.1 | Page 69

Short Answer Question.

Observe the given pedigree chart and answer the following question.

Identify whether the trait is sex-linked or autosomal.

Exercises | Q 3.1 | Page 69

Short Answer Question.

Observe the given pedigree chart and answer the following question.

Give an example of a trait in human beings which shows such a pattern of inheritance.

Exercises | Q 4 | Page 69

Match the column-I with column-II and re-write the matching pairs.

Column-I Column-II
1. 21 trisomy a. Turner’s syndrome
2. X-monosomy b. Klinefelter’s syndrome
3. Holandric traits c. Down's syndrome
4. Feminized male d. Hypertrichosis
Exercises | Q 5.1 | Page 69

Very Short Answer Questions.

Define dihybrid cross

Exercises | Q 5.1 | Page 69

Long answer type question.

Explain a dihybrid cross with suitable example and checker board method.

Exercises | Q 5.2 | Page 69

Long answer type question.

Explain with suitable example an independent assotrment.

Exercises | Q 5.3 | Page 69

Long answer type question.

Define test cross and explain its significance.

Exercises | Q 5.4 | Page 69

What is parthenogenesis?

Exercises | Q 5.4 | Page 69

Long answer type question.

Explain the haplo-diploid method of sex determination in the honey bee.

Exercises | Q 5.5 | Page 69

Long answer type question.

In the answer for inheritance of X-linked genes, Madhav had shown carrier male. His answer was marked incorrect. Madhav was wondering why his marks were cut. Explain the reason.

Exercises | Q 5.6 | Page 69

Long answer type question.

With the help of a neat labelled diagram, describe the structure of chromosome.

Exercises | Q 5.7 | Page 69

What is cris-cross inheritance?

Exercises | Q 5.7 | Page 69

Long answer type question.

Explain cris-cross inheritance with suitable example.

Exercises | Q 5.8 | Page 69

Long answer type question.

Describe the different types of chromosomes.

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Chapter 3: Inheritance and Variation

Exercises
Balbharati solutions for Biology 12th Standard HSC for Maharashtra State Board chapter 3 - Inheritance and Variation - Shaalaa.com

Balbharati solutions for Biology 12th Standard HSC for Maharashtra State Board chapter 3 - Inheritance and Variation

Balbharati solutions for Biology 12th Standard HSC for Maharashtra State Board chapter 3 (Inheritance and Variation) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the Maharashtra State Board Biology 12th Standard HSC for Maharashtra State Board solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. Balbharati textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Biology 12th Standard HSC for Maharashtra State Board chapter 3 Inheritance and Variation are Heredity, Inheritance, Gregor Johann Mendel – Father of Genetics, Back Cross and Test Cross, Deviations from Mendel’s Findings, Chromosomal Theory of Inheritance, Chromosomes - The Carriers of Heredity, Linkage and Crossing Over, Autosomal Inheritance, Sex Linked Inheritance, Sex Determination, Genetic Disorders, Genes and Genetic, Mendelian Inheritance - Mendel’s Laws of Heredity.

Using Balbharati 12th Board Exam solutions Inheritance and Variation exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Balbharati Solutions are important questions that can be asked in the final exam. Maximum students of Maharashtra State Board 12th Board Exam prefer Balbharati Textbook Solutions to score more in exam.

Get the free view of chapter 3 Inheritance and Variation 12th Board Exam extra questions for Biology 12th Standard HSC for Maharashtra State Board and can use Shaalaa.com to keep it handy for your exam preparation

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