Start learning →

NEET UG Principles of Inheritance and Variation — practice questions — page 4

Explore 137 free Principles of Inheritance and Variation questions in NEET UG Biology. Open each question or exercise to read its content, reference answers and available explanation.

Practise Principles of Inheritance and Variation with Quill →

Principles of Inheritance and Variation questions and exercises with answers

Showing questions 91–120 of 137.

Mirabilis jalapa, used to show incomplete dominance, is commonly called:Read the answer and worked solution →How many alleles does the human ABO blood group gene I have?Read the answer and worked solution →What does the allele i of the ABO gene do on red blood cells?Read the answer and worked solution →How many genotypes are possible for the human ABO blood groups?Read the answer and worked solution →Multiple alleles of a gene can be detected only through:Read the answer and worked solution →In the F2 of an RrYy x RrYy cross, what fraction is wrinkled and green?Read the answer and worked solution →How many different genotypes arise in the F2 of a dihybrid cross?Read the answer and worked solution →In which year did Mendel first present his pea hybridisation results?Read the answer and worked solution →In which year was Mendel's work on inheritance rediscovered?Read the answer and worked solution →Who noted that chromosome behaviour parallels gene behaviour?Read the answer and worked solution →Which organism did Morgan use to study linkage and recombination?Read the answer and worked solution →Morgan's dihybrid F2 deviated from 9:3:3:1 because the genes were:Read the answer and worked solution →Who coined the term linkage for the physical association of genes?Read the answer and worked solution →Recombination between the white and yellow genes of Drosophila was:Read the answer and worked solution →In Drosophila, which gene pair is more tightly linked?Read the answer and worked solution →Polygenic traits such as human height are controlled by:Read the answer and worked solution →Which is a classic example of a polygenic trait in humans?Read the answer and worked solution →If genes A, B and C set skin colour additively, what colour is AaBbCc?Read the answer and worked solution →A single gene that shows several phenotypic effects is called:Read the answer and worked solution →Phenylketonuria results from a mutation in the gene for which enzyme?Read the answer and worked solution →Grasshoppers show which type of sex determination?Read the answer and worked solution →In humans and Drosophila, the male sex chromosome makeup is:Read the answer and worked solution →How many chromosomes does a male honey bee (drone) have?Read the answer and worked solution →Male honey bees produce sperms by which type of division?Read the answer and worked solution →A change in a single base pair of DNA is called a:Read the answer and worked solution →Studying how a trait passes through generations of a family is called:Read the answer and worked solution →Mendelian disorders are mainly caused by:Read the answer and worked solution →Which of these is NOT a Mendelian disorder?Read the answer and worked solution →Red-green colour blindness occurs in about what share of males?Read the answer and worked solution →A carrier woman's son has what chance of being colour blind?Read the answer and worked solution →

Worked practice questions

Mirabilis jalapa, used to show incomplete dominance, is commonly called:

  1. Morning glory
  2. Dog flower plant
  3. Four o'clock plant
  4. Sweet pea plant
Show answer and solution

Correct answer: C. Four o'clock plant

Mirabilis jalapa is the four o'clock plant, whose heterozygotes have intermediate flower colour.

Open this question →

How many alleles does the human ABO blood group gene I have?

  1. Two alleles
  2. Four alleles
  3. Three alleles
  4. Six alleles
Show answer and solution

Correct answer: C. Three alleles

Gene I has three alleles, IA, IB and i.

Open this question →

What does the allele i of the ABO gene do on red blood cells?

  1. Produces no sugar
  2. Produces both sugars
  3. Produces sugar B
  4. Produces sugar A
Show answer and solution

Correct answer: A. Produces no sugar

Allele i makes no sugar polymer, which is why it is recessive to IA and IB.

Open this question →

How to practise

  1. Choose a Principles of Inheritance and Variation question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

Put it into practice

Continue with Principles of Inheritance and Variation practice for NEET UG. Read explanations as you go. No signup form needed to start.

Practise Principles of Inheritance and Variation →

More Biology topics

Genetics and EvolutionReproduction in Organisms & PlantsBiotechnology and ApplicationsBiodiversity and ConservationThe Living World & Biological ClassificationNeural Control and Chemical CoordinationAnimal KingdomBiology in Human Welfare & Health