BIO 220 -EVOLUTIONARY BIOLOGY EXAM
QUESTION AND CORRECT ANSWERS GRADED A+
2025
mutation
a mutation is a change in the amount/structure/make-up of DNA
DNA
deoxyribonucleic acid
variation
means that there are differences between the members of a same species
inherited trait
A characteristic that is passed from one generation to another.
causes of variation
genetic variation is caused by sexual reproduction and by mutations
genetic variation - mendels 2nd law
, at gamete formation the chromosomes that have been inherited from a persons
mother and father may enter the gamete in various different combinations
3 ways in which sexual reproduction leads to genetic variation
- during meiosis
- at gamete formation
- at fertilisation
somatic cells
not a sex cell, normal body cell
mutations in gametes
the mutation is passed onto all of the cells the offspring produced, very serious
mutations in somatic cells
not passed to future generations but passed to all other somatic cells derived from
it, can cause cancer
causes of mutations
QUESTION AND CORRECT ANSWERS GRADED A+
2025
mutation
a mutation is a change in the amount/structure/make-up of DNA
DNA
deoxyribonucleic acid
variation
means that there are differences between the members of a same species
inherited trait
A characteristic that is passed from one generation to another.
causes of variation
genetic variation is caused by sexual reproduction and by mutations
genetic variation - mendels 2nd law
, at gamete formation the chromosomes that have been inherited from a persons
mother and father may enter the gamete in various different combinations
3 ways in which sexual reproduction leads to genetic variation
- during meiosis
- at gamete formation
- at fertilisation
somatic cells
not a sex cell, normal body cell
mutations in gametes
the mutation is passed onto all of the cells the offspring produced, very serious
mutations in somatic cells
not passed to future generations but passed to all other somatic cells derived from
it, can cause cancer
causes of mutations
