Question
Explain the laws that Mendel derived from his monohybrid crosses.
✓
Answer
Law of dominance and law of segregation are the two laws, Mendel derived from his monohybrid crosses.
- Law of dominance explains that in a dissimilar pair of factors of a trait, one of them expresses itself (dominant) and the other remains hidden (recessive).
- It also explains the expression of both the traits in the F, progeny, in a ratio of 3 : 1.
- Law of segregation states that the members of an allelic pair that remained together in the parent/ hybrid, segregate during gamete formation and enter different gametes.
- A homozygous parent produces all gametes that are similar while the heterozygous one produces two kinds of gametes, each having one allele for a trait.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
How many eggs are released by a human ovary in a month? How many eggs do you think would have been released if the mother gave birth to identical twins? Would your answer change if the twins born were fraternal?
Write the important functions of various reproductive organs of human female.
Mention the functions of trophoblast in human embryo.
The image below shows two germinated seeds X and Y which belong to the same species. Seed X is produced by apomixis whereas seed Y is a product of sexual reproduction.
A. Write the number of embryo(s), embryo sac(s) and ovules in the ovary of seed X.
B. How multiples embryos are formed in citrus fruits?
C. What advantage will plants developed from seed Y have over seed X?
A. Write the number of embryo(s), embryo sac(s) and ovules in the ovary of seed X.
B. How multiples embryos are formed in citrus fruits?
C. What advantage will plants developed from seed Y have over seed X?
Classify the following contraceptive measures into different methods of birth control.
- Saheli.
- Tubectomy.
- Vasectomy.
- Condoms.
- Diaphragms.
- Cervical caps.
Study the population growth curves in the graph given below and answer the questions which follow:
- Identify the growth curves ‘a’ and ‘b'.
- Which one of them is considered a more realistic one and why?
- If dN/dt=rN(K-N/K) is the equation of the logistic growth curve, what does K stand for?
- What is symbolised by N?
- Write the two limitations of traditional breeding technique that led to promotion of micro propagation.
- Mention two advantages of micro propagation.
- Give two examples where it is commercially adopted.
Draw a labelled diagram of transverse section of anther. Describe the Internal structure of micro sporangium.
“Pollen grains has some harmful effects”. Discuss.
State the function of a reservoir in a nutrient cycle. Explain the simplified model of carbon cycle in nature.