Week 1 - Continuity of Life

Question 1

Reproduction

Answer 1

Continuity of life

Process by which organisms produce offspring similar to themselves

Question 2

DNA

Answer 2

Common genetic material for all organisms

Carries info coded in genes

Question 3

Gene

Answer 3

Section of DNA that codes for a particular characteristic
Can be read and switched on/off independently of other genes
Gene said to be expressed when it is turned on and read

Question 4

Chromosomes

Answer 4

Located in nucleus of cell
Carry genes
One DNA molecule along with proteins associated with it

Question 5

Karyotypes

Answer 5

An organisms complete set of chromosomes, arranged as homologous pairs

Question 6

Asexual reproduction

Answer 6

Living things that originate from one parent

Usually closely resemble their parent - one one source of heredity information

Question 7

Sexual Reproduction

Answer 7

2 sources of heredity material
Carried in reproductive cells - gametes
Potential for differences between generations greater than asexual reproduction

Question 8

Homologous Chromosomes

Answer 8

Pair of chromosomes that have the same size, shape and genes at the same location

Question 9

Autosomes

Answer 9

Chromosomes that are the same in both male & female species

Question 10

Sex chromosomes

Answer 10

Chromosomes that affect sex traits
One sex has homogenous set
Other sex has dissimilar set

Question 11

Binary Fission

Answer 11

Occurs in prokaryotic cells eg. Bacteria, amoeba
Produces 2 daughter cells with same number of chromosomes as parental cells
Replicate their single DNA strand