A graphical representation to calculate the probability of all possible genotypes of offspring in a genetic cross is called as:
1. | Forked line diagram | 2. | Punnett square |
3. | Pedigree chart | 4. | Idiogram |
When Mendel self-hybridized F1 progeny of a dihybrid cross between pure Yellow Round seeded plants and Green Wrinkled plants, he observed that yellow and green colour segregated in a ratio of:
1. | 1 : 1 | 2. | 3 : 1 |
3. | 9 : 3 : 3 : 1 | 4. | 1 : 2 : 1 |
Identify the incorrect statement regarding experiments on Pisum sativum by Gregor Mendel:
1. | He conducted hybridisation experiments on garden peas for seven years (1856-1863) and proposed the laws of inheritance in living organisms. |
2. | It was for the first time that statistical analysis and mathematical logic were applied to problems in biology. |
3. | Unfortunately his experiments had a small sampling size, which gave less credibility to the data that he collected. |
4. | He investigated characters in the garden pea plant that were manifested as two opposing traits. |
‘When two pairs of traits are combined in a hybrid, segregation of one pair of characters is independent of the other pair of characters’. This is the statement of:
1. Law of Dominance
2. Law of segregation
3. Law of Independent Assortment
4. Law of Linkage
Mendelian disorders are mainly determined by:
1. | Alteration or mutation in a single gene. |
2. | Chromosomal gross structural changes. |
3. | Recombination between linked genes. |
4. | Jumping genes |
The branch of biology that deals with inheritance, as well as the variation of characters from parents to offspring, is called as:
1. | Evolution | 2. | Genetics |
3. | Developmental biology | 4. | Forensics |
In 1900, Mendel’s work was rediscovered by:
1. | Khorana, Nirenberg and Mathei |
2. | de Vries, Correns and von Tschermak |
3. | Avery, McCleod and McCarty |
4. | Watson, Crick and Wilkins |
The ultimate source of allelic variation is:
1. | Recombination | 2. | Natural selection |
3. | Mutation | 4. | Drift |
Which of the following was not a character studied by Mendel in garden pea?
1. | Flower position | 2. | Pod shape |
3. | Flower colour | 4. | Pod position |
What can be the blood groups of progeny whose father and mother are of AB and O blood groups, respectively?
1. | A and B only | 2. | AB only |
3. | All except O | 4. | A, B, AB, and O |