Variation, inheritance and evolution parts 1 and 2

Question 1

what does mitosis do to the number of chromosomes?

Answer 1

halves them

Question 2

where are gametes made

Answer 2

in reproductive organs (in animals ovaries and testes)

Question 3

cells divide by ….. to form gametes

Answer 3

meiosis

Question 4

meiosis

Answer 4

copies of the genetic info are made]cell divides twice to form 4 gametes each with single set of chromosomes
all gametes are genetically different from each other

Question 5

sexual reproduction involves the fusion of male and female gametes an example

Answer 5

sperm and egg in animals

pollen and egg cells in flowering plants

Question 6

sexual reproduction

Answer 6

produced my meiosis

mixing of genetic information which leads to a variety in the offspring

Question 7

asexual reproduction

Answer 7

only mitosis
no mixing of genetic info
leads to genetical identical clones

Question 8

why is the study of human genome important for medical research

Answer 8

Searching for genes linked to different types of disease.
A sequence of 3 bases is the code for a particular amino acid. The order of bases controls the order in which each amino acid is assemble to produce a specific protein.
Understanding and treatment of inherited disorders.
Tracing migration patterns from the past

Question 9

Embryo screening /gene therapy issues

ECONOMIC

Answer 9

costly and not 100% reliable

Question 10

Embryo screening /gene therapy issues

SOCIAL

Answer 10

not available to everyone due to cost

Question 11

Embryo screening /gene therapy issues

ETHICAL

Answer 11

Should only ‘healthy’ embryos be implanted following screening.