Reproductive cells

Question 1

What is the only precess by which human species can maintain or increase its number?

Answer 1

Sexual reproduction

Question 2

What is genetic diversity?

Answer 2

Different combinations of genes (alleles)

Question 3

What are alleles?

Answer 3

The eye color gene can be composed of blue eye allele, green eye allele, etc.

Question 4

What is phenotype?

Answer 4

It is the way in which genes express

Question 5

What is genotype?

Answer 5

The genetic combination of an organism (All alleles of all genes)

Question 6

What is natural selection?

Answer 6

It is the differential survival and reproduction of individuals due to differences in phenotype.

Question 7

How is the loosely packed DNA called?

Answer 7

Chromatin

Question 8

How are sections of DNA called?

Answer 8

Genes, they are coding for proteins.

Question 9

Why does a gene codes a certain type of protein?

Answer 9

Ex: Insulin receptor gene codes for insulin receptor protein.

Question 10

What process leads to the condensation of DNA into chromosomes?

Answer 10

Cell division (Growth or production of gametes)

Question 11

How do we call the halves resullting from the duplication of a chromosome?

Answer 11

Sister chomatids

Question 12

What type of cell has 23 pairs of chromosomes?

Answer 12

Somatic cells

Question 13

What type of cell has 23 chromosomes?

Answer 13

Gametes

Question 14

What type of cell is haploid?

Answer 14

Gametes

Question 15

What type of cell is diploid?

Answer 15

Somatic cells

Question 16

What is the difference between haploid and diploid cells?

Answer 16

Haploid cells have 1 copy of each type of chromosome and diploid cells have 2 copies of each type of chromosome.

Question 17

What is the karyotype?

Answer 17

Number and appearance of chromosomes in a cell.

Question 18

What is the role of meiosis?

Answer 18

It reduces the chromosome number in half, It produces gametes, It creates unique gene combinations, and It produces 4 unique haploid cells.