chromosome mutations

Question 1

what are the 2 different types of chromosome mutations

Answer 1

changes in whole sets of chromosomes

changes in number of individual chromosomes

Question 2

what type of cells are gametes

Answer 2

haploid cells

Question 3

what type of cells are human body cells

Answer 3

diploid

Question 4

what type of cells are plants

Answer 4

polyploid

Question 5

define polyploid

Answer 5

3 or more sets of homologues chromosome’s

Question 6

define haploid

Answer 6

1 set of homologous chromosomes

Question 7

define diploid

Answer 7

2 sets of homologous chromosomes

Question 8

give 2 examples of when there are changes in the number of individual chromosome’s

Answer 8

• downs syndrome
  (additional chromosome on chromosome 21)
• Edwards syndrome
  (additional chromosome on chromosome 18)

Question 9

how do changes in the number of individual chromosomes occur

Answer 9

failure to separate homologous pairs of chromosomes during meiosis

Question 10

define non disjunction

Answer 10

gamete can have an extra chromsome or one less

Question 11

if there is a change in the number of individual chromosomes what does this mean at fertilisation

Answer 11

at fertilisation offspring will hake an additional copy of a chromosome