Download App

Inheritance and Variation — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYInheritance and Variation3 Marks
Question
What are the main generalizations given after Mendel’s experiments on the pea plant?
✓

Answer

After the Mendel’s laws of inheritance and his experiments, following generalizations were made:

  1. Single trait is shown due to single gene. Every single gene has two contrasting alleles.
  2. Two alleles are always in interaction in which one is completely dominant while other is completely recessive.
  3. Factors which were later called genes for different traits are always present on different chromosomes. These traits can assort independently of each other.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Answer the following questions in detail." from Inheritance and Variation→Inheritance and Variation — all question types→BIOLOGY STD 12 Science question papers→Maharashtra Board STD 12 Science question papers→Maharashtra Board question paper generator→

Similar questions

What are the limitations of ecological pyramids?
→
How degeneracy of the code is explained by Wobble hypothesis?
→
Give any two reasons why the patent on Basmati should not have gone to an American Company.
→
Prior to a sports event blood & urine samples of sportspersons are collected for drug tests.
  1. Why is there a need to conduct such tests?
  2. Name the drugs the authorities usually look for.
  3. Write the generic names of two plants from which these drugs are obtained.
→
What will happen to an ecosystem if:
  1. All producers are removed;
  2. All organisms of herbivore level are eliminated;
  3. All top carnivore population is removed.
→
  1. Explain the phenomena of multiple alleles and co-dominance taking ABOblood group as an example.
  2. What is the phenotype of the following:
  1. $I^A i$
  2. $i i$
→
  1. It is generally observed that the children who had suffered from chicken - pox in their childhood may not contract the same disease in their adulthood. Explain giving reasons the basis of such an immunity in an individual. Name this kind of immunity.
  2. What are interferons? Mention their role.
→
  1. Write the importance of measuring the size of a population in a habitat or an ecosystem.
  2. Explain with the help of an example how the percentage cover is more meaningful measure of population size than mere number.
→
Explain co-evolution with reference to parasites and their hosts. Mention any four special adaptive features evolved in parasites for their parasitic mode of life.
OR
Explain parasitism and co-evolution with the help of one example of each.
→
  1. List the two methodologies which were involved in human genome project. Mention how they were used.
  2. Expand ‘YAC’ and mention what was it used for.
→