Q. No.Identify the correct statements regarding linked genes:
I.
are located near each other on the same chromosome.
II.
violate the law of independent assortment.
III.
segregate together during meiosis.
1.
I & II only
2.
I & III only
3.
II & III only
4.
I, II & III
What is the critical difference between genetic transfer in bacteria and sexual reproduction?
| 1. | In genetic transfer, genetic material is transferred from one individual to another. |
| 2. | In sexual reproduction, genetic material from two individuals is mixed equally. |
| 3. | In both processes, the individual donating genetic material retains their original complement of genetic material. |
| 4. | None of these. |
Transduction, transformation, and conjugation are all characterized by:
| I. | All require the presence of an outside factor to facilitate gene transfer. |
| II. | In all three processes, DNA is transferred as a single-stranded molecule. |
| III. | They all transfer large pieces of DNA into recipient cells. |
1. I & II only
2. I & III only
3. II & III only
4. None of the three statements is correct
The inheritance of the trait shown in the given pedigree cannot be a/an:
| I. | Autosomal dominant disorder |
| II. | Sex-linked dominant disorder |
| III. | Holandric disorder |
| 1. | Only I and II | 2. | Only I and III |
| 3. | Only II and III | 4. | I, II, and III |
Which of the following statements regarding ‘gene’ will be correct?
| I. | Can be described as a unit of heredity. |
| II. | Contains information to produce a particular protein. |
| III. | Affects traits at the cellular level. |
| IV. | Can exist in many forms. |
The correct statements include:
| 1. | I, II, and III only | 2. | II, III, and IV only |
| 3. | I, III, and IV only | 4. | I, II, III, and IV |
PisumSativum is self-pollinated in crops. Why this can be a problem when used for experiments like those conducted by Mendel?
| 1. | Self-pollinated plants tend to be weaker and require more care. |
| 2. | Self-pollinated plants are not able to produce viable seeds due to inbreeding. |
| 3. | Stamens must be removed from self-pollinated plants to control fertilization. |
| 4. | Pistils of self-pollinated plants are unable to accept pollen from other plants. |
Half of the mice (all males) have yellow body colour while the females are wild type(gray) in a cross between true-breeding wild type male flies and true-breeding female flies with yellow body colour. This, most likely, is due to the fact that:
| 1. | Some of your females had already mated with yellow males before you collected them. |
| 2. | Some of your parental flies must have had a new mutation in their germ cells. |
| 3. | The mutation which causes yellow body color is on the X chromosome. |
| 4. | The mutation which causes yellow body color is on the Y chromosome. |
What would be the correct definition of a ‘locus’ in genetics ?
| 1. | One version of a gene. |
| 2. | The location of a gene along the chromosome. |
| 3. | The character of the gene effects. |
| 4. | The mechanism of action of a gene. |
Consider crossing over does not take place between chromosomes shown as:
(i) Chromosome 1: ABC/abc
(ii) Chromosome 2:Qr, qr.
Which of the following gametes will not be formed by this organism?
| 1. | ABCqr | 2. | abcqr |
| 3. | ABcqr | 4. | abcQr |
Black coat colour is a dominant trait while the albino trait is recessive in mice. You want to raise only black-coat mice as they appear more graceful to you. You crossed black mice with albino mice thinking that all progeny will be black based on dominance. You felt disappointed when your cross yielded only three black-coat mice out of seven. This is because you incorrectly:
| 1. | assumed that black alleles were more common than white. |
| 2. | assumed that white alleles were more common than black. |
| 3. | assumed that my black mouse was true-breeding. |
| 4. | assumed that my white mouse was true-breeding. |
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