Class 12th Biology 2011 Set3 Delhi Board Paper Solution
Question 23
How are dominance, codominance and incomplete dominance patterns of inheritance different from each other?
Answer
a. Dominance – When two traits (character) of a species is crossed, resulting offspring in F1 generation displays character of any one parent then it called as dominance.
b. Co-dominance – When two traits (character) of a species crossed, resulting offspring in F1 generation display characters of parents then it is called as co-dominance, e.g ABO blood group.
c. Incomplete - When two traits (character) of a species is crossed, resulting offspring in F1 generation don’t resemble either of parents so called as incomplete dominance.
Popular Questions of Class 12th biology
- Q:- What is spermatogenesis? Briefly describe the process of spermatogenesis.
- Q:- Why is reproduction essential for organisms? Answer
- Q:- Write a short note on
(a) Adaptations of desert plants and animals
(b) Adaptations of plants to water scarcity
(c) Behavioural adaptations in animals
(d) Importance of light to plants
(e) Effect of temperature or water scarcity and the adaptations of animals. - Q:- With a neat diagram explain the 7-celled, 8-nucleate nature of the female gametophyte.
- Q:- What is DNA fingerprinting? Mention its application.
- Q:- What is oogenesis? Give a brief account of oogenesis.
- Q:- Describe the structure of a seminiferous tubule.
- Q:- What is triple fusion? Where and how does it take place? Name the nuclei involved in triple fusion.
- Q:- With a neat, labelled diagram, describe the parts of a typical angiosperm ovule.
- Q:- Explain the Law of Dominance using a monohybrid cross.
Recently Viewed Questions of Class 12th biology
- Q:- Diagrammatically represent the experimental steps in cloning and expressing an human gene (say the gene for growth hormone) into a bacterium like E. coli ?
- Q:- Explain what is meant by biofortification.
- Q:- List two essential roles of ribosome during translation.
- Q:- If a population growing exponentially double in size in 3 years, what is the intrinsic rate of increase (r) of the population?
- Q:- Try to trace the various components of human evolution (hint: brain size and function, skeletal structure, dietary preference, etc.)
- Q:- Explain briefly
(a) PCR
(b) Restriction enzymes and DNA
(c) Chitinase - Q:- From what you have learnt, can you tell whether enzymes are bigger or DNA is bigger in molecular size? How did you know?
- Q:- Distinguish between the following:
(a) Hibernation and Aestivation
(b) Ectotherms and Endotherms - Q:-
Why is the Human Genome project called a mega project?
- Q:- Explain the Law of Dominance using a monohybrid cross.