The ability of one genotype to produce more than one phenotype when exposed to different environments is called as:
1. Developmental noise
2. Norm of the reaction
3. Phenotypic plasticity
4. Variable expressivity

In a human population, 1 in 10,000 are affected with an autosomal recessive disorder. What proportion of that human population is likely to be a carrier of the recessive allele?
1. approximately 0.02
2. approximately 0.19
3. approximately 0.98
4. approximately 0.2

Identify the incorrectly matched pair:

Presence of a Barr body, a Y chromosome in the karyotype and the affected individual having gynecomastia point to:
1. Klinefelter’s syndrome
2. Cri-du-chat syndrome
3. Turner’s syndrome
4. Edward’s syndrome

In which genetic condition, each cell in the affected person, has three sex chromosomes XXY?

1. Thalassemia

2. Klinefelter's Syndrome

3. Phenylketonuria

4. Turner's Syndrome

A “wild” allele is the one that:
1. is the allele that is the most common in the population.
2. is the allele with the highest level of functional protein.
3. is the most favorable allele in the population.
4. is the largest allele for the gene

What would be true for an allotetraploid species:

I: It contains a complex diploid set from each parent
II: It can produce viable gametes
III: It may be important in agriculture
1. I & II only
2. I & III only
3. II & III only
4. I, II & III

A dihybrid cross does not give the expected phenotypic ratio in F2 generation. This may be due to
I. Epistasis
II. Multiple genes affecting your trait of interest
III. Linkage
1. I & II only
2. I &III only
3. II & III only
4. I, II & III

Chromosomal aberrations include:
I. Duplication
II. Inversion
III. Translocation
IV. Deletion

1. I, II, & III only
2. I, III & IV only
3. II, III & IV only
4. I, II, III & IV

The chromosomal aberration ‘duplication’ is best described as:
1. The presence of an extra copy of an existing chromosome.
2. The presence of an entirely new piece of chromosomal material.
3. The presence of an extra copy of a piece of chromosomal material.
4. The result of chromosomal material exchanged between two chromosomes.