Interaction between two alleles which are present on the same gene locus of two homologous chromosomes is called
Important Questions on Inheritance and Variation
Match the following
| List - I | List - II | ||
| (a) | Holandric genes | (i) | Pleiotropy |
| (b) | Multiple effects of a single gene | (ii) | Hypertrichosis |
| (c) | Skin colour in man | (iii) | Multiple Alleles |
| (d) | Blood types | (iv) | Polygenic inheritance |
The correct answer is
The best example for pleiotropy is:
Statement (S): The heterozygous individuals for sickle-cell anaemia express disease phenotype and also carriers of the disease.
Reason (R): genotype individuals are resistant to severe effects of malaria.
The correct answer is
blood type in man is an example of
1. Pleiotropy
2. Incomplete dominance
3. Co-dominance
4. Multiple allelism
Select the code for the correct answer from the options given below:
Human height is a multigenic character. If the heights of all the individuals living in a metropolis are measured and the percentages of the population belonging to a specific heat are plotted as shown below, which of the plots would represent the most realistic distribution?
| Column – I | Column – II |
| (a) Dominance | (i) Many genes govern a single character |
| (b) Codominance | (ii) In a heterozygous organism, only one allele expresses itself |
| (c) Pleiotropy | (iii) In a heterozygous organism, both alleles express themselves fully |
| (d) Polygenic inheritance | (iv) A single gene influences many characters |
