Question

1. The appearance resulting from a given gene combination(allele) is referred to as the:

1. Genotype
2. stereotype
3. phenotype
4. alleleotype

2. All sperm cells carry:

1. 46 chromosomes
2. Either a  X and a Y chromosome
3. 23 chromosomes
4. Do not contain X and Y chromosomes

3. ____________ is referred to when chromosome number is normal:

1. Euploid
2. Polyploidy
3. Trisomy
4. Polysomy

4. Hemophilia results from:

1. Absence of one chromosome
2. Presence of an extra chromosome
3. Presence of dominant gene on both X chromosomes
4. Presence of recessive gene on both X chromosome

5. Being a male depends upon presence of:

1. X chromosome
2. Y chromosome
3. Autosome chromosomes
4. Absence of Y chromosome

6. Polyploidy results from:

1. Extra pair of chromosomes
2. Extra chromosome
3. Absence of a chromosome
4. Absence of a pair of chromosomes

7. Production of sperm or egg cells is due to:

1. Mitotic division
2. Meiotic division
3. Presence of X or Y chromosomes
4. Absence of X or Y chromosomes

8. The __________ gene on Y chromosome is responsible for male traits:

1. SRY
2. SYR
3. RSY
4. YSR

9. In humans, autosomal genes are:

1. Present on X chromosome
2. Present on Y chromosome
3. Present on all sex chromosomes
4. Present on all non-sex chromosomes

10. Genes on a chromosome are made of :

1. lipids
2. carbohydrates
3. nucleotides
4. amino acids

Answer 1

1) option c :- physical trait( appearance) associated with genotype is called phenotype.

2) option c :- All sperm cells carry 23 chromosomes that results from process of meiosis.

3) None of the 4 options are correct. Euploid(cell with one extra set of 23 chromosomes), polyploidy(having 2 paired sets of chromosomes), Trisomy(presence of one extra copy of chromosome in cell nuclei), polysomy(presence of three or more copies of chromosomes).

4) option d:- presence of recessive gene on both x chromosome.

5) option b:- y chromosome.

6)option A:- presence of extra pair of chromosomes.

7) option b:- meiotic division.

8)option A:- SRY gene.

9)option d:- Autosomes refered to the non sex chromosomes.

10) option d:- Amino acids.