Which of the following experiments can show a gene to be located on the X-chromosome?
I. set up reciprocal crosses
II. set up two point test cross
1. Only I
2. Only II
3. Neither I nor II
4. Both I & II

A man and woman who both have normal pigmentation but both having an albino parent have two children both with normal pigmentation. What is the probability that their child might be an albino?
1. 0
2. ¼
2. ½
3. ¾

Sons inherit the following exclusively from their mothers:
I. SR Y gene
II. X chromosome
III. Mitochnodrial DNA
1. Only II
2. Only I and III
3. Only II and III
4. Only III

Identify the chromosomal aberration:

1. Inversion
2. Translocation
3. Deletion
4. Duplication

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.