Who propounded the chromosomal theory of inheritance?
- AMendel
- BSutton and Boveri
- ✓Morgan
- DHenking
Answer: C.
View full solution →Question types
Principles of Inheritance and Variations question types
87 questions across 3 question groups — pick any mix to generate a BIOLOGY paper with step-by-step answer keys.
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Sample Questions
Principles of Inheritance and Variations questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Which of the following is not a chromosomal discorder?
- ADown's syndrome
- BKlinefelter's syndrome
- CTurner's syndrome
- ✓Haemophilia
Answer: D.
View full solution →What is the cytological basis of law of independent assortment?
- AThere is no blending of alleles
- ✓Alleles of a pair separate during gamete formation
- CAlleles may be dominant or recessive
- DPair of chromosomes arrange themselves in line independently in metaphase I
Answer: B.
View full solution →Which of the following statements is incorrect?
- ACharacters are controlled by factors
- BFactors are discrete
- CIn pea, factors are in pairs
- ✓Alleles blend with each other
Answer: D.
View full solution →In a cross between true breeding red flowered and true breeding white flowered plants of Antirrhinum the $F _1$ generation was pink flowered which is an example of :
- ADominance
- BCodominance
- ✓Incomplete dominance
- DBlending of contrasting forms of a character
Answer: C.
View full solution →The cytological observations made in a number of insects led to the development of the concept of genetic/chromosomal basis of sex-determination mechanism. Honey bee is an interesting example to study the mechanism of sex - determination. Study the schematic cross between the male and the female honey bees given below and answer the questions that follow :
(a) Identify the cell divisions 'A' and 'B' that lead to gamete formation in female and male honey bees respectively.
(b) Name the process 'C' that leads to the development of male honey bee (drone).
(a) Identify the cell divisions 'A' and 'B' that lead to gamete formation in female and male honey bees respectively.
(b) Name the process 'C' that leads to the development of male honey bee (drone).
Create the symbol used for male, female copulation and homogancy in human genedlogical analysis.
What do you understand by gene mutation?Explain.
In garden pea plants, the green colour of the pod (G) is dominant over the yellow colour of the pod (g). To determine the genotype of a plant with an unknown genotype, use a Punnett square to show the genotypes and phenotypes in a test cross.
Write a comment on sex chromosome.
What is a test cross? How can it decipher the heterozygosity of a plant?###Explain Mendel's Test cross only by figure.###What is a test cross? Show phenotypic ratio 1 : 1 in a monohybrid test cross through punnet square.###During a monohybrid corss involving a tall pea plant with a dwarf pea plant the offspring populations were tall and dwarf in equal ratio work out a cross to show how it possible.
What do you understand by sex-determi-nation?###What is sex determination? Describe various types of sex determination
What do you understand by chromosomal disorders? Describe the following genetic disorders giving reasons and relative abnormalities.
(a) Down's Syndrome
(b) Klinefelter's Syndrome
(c) Turner's Syndrome
(a) Down's Syndrome
(b) Klinefelter's Syndrome
(c) Turner's Syndrome
What do you understand by crossing over? Describe the mechanism of crossing over with suitable diagram.
Write about multiple allelism with suitable example.###Describe multiple albinism showing the inheritance pattern of blood groups in human beings.
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