Two genes are linked. The frequency of recombinants formed between the two loci will be:
1. different between males and females.
2. determined by their relative dominance.
3. the same as if they were not linked.
4. proportional to the distance between them.

The chromosomal analysis of a human being, phenotypically female, does not show Barr body. This is most likely:
1. Normal condition
2. Turner’s syndrome
3. Meta female
4. Klinefelter’s syndrome

Which gene pair in Pisumsativum ought to have shown linkage?
1. Violet versus white flower color and green versus yellow pod color
2. Green versus yellow pod color and tall versus dwarf plant height
3. Full versus constricted pods and Green versus yellow pod color
4. Full versus constricted pods and tall versus dwarf plant height

A true breeding (pure line) plant can be differentiated from a hybrid as:
1. They only have one type of allele of the gene that controls the trait of interest.
2. They carry two different alleles for the gene that controls the trait of interest.
3. They can only reproduce by self fertilization.
4. They all have dominant alleles for the trait of interest.

 

A dihybrid test cross results in a 1.2% frequency of recombination. This implies that:
1. genes are located on sex chromosomes.
2. genes are located on heterologous chromosomes.
3. genes exhibit epistatic two factor interaction.
4. genes are located very close to one another on the same chromosome.

In heterozygous condition, the dominant allele is able to express itself only in one sex. This is a
1. A sex limited trait
2. A sex influenced trait
3. A sex linked trait
4. sex-determining trait.

Which field of genetics is the oldest?
1. Transmission genetics.
2. Molecular genetics.
3. Population genetics.
4. Developmental genetics.

‘Molecular genetics’ will be concerned with
1. Production of a new mutant allele of an interesting gene.
2. Hybridizing different varies of plant species
3. studying general allele frequency in a population
4. classification of newly discovered species

What might be the significance of creating a transgenic mice expressing gene for green fluorescent proteins enabling it to glow green in the dark?
1. They can be a source of pleasure for the kids

2. It served as an effective demonstration that an extra gene could be incorporated into and expressed in most tissues of a model organism.

3. They can be seen by predators in the dark

4. This helps identification of transgenic mice.

Match each item in COLUMN I [genetic disorder] with its description in Column II and select the correct answer from the codes given:

Codes:
   A B C D
1. a b c d
2. b a c d
3. a b d c
4. b a d c