Inheritence Vairiation & Evolution Flashcards
(15 cards)
1
Q
Neucleotides are formed from-
A
A phosphate group
A sugar
A base
2
Q
The four bases
A
Adenine
Thymine
Cytosine
Guanine
3
Q
What two bases always pair
A
Adenine with thymine
&
Cytosine with guanine
4
Q
Why is DNA double stranded
A
Reduces risk of mutation
5
Q
Definition of mutation
A
A change in the dna base sequence
6
Q
Meiosis
A
.
7
Q
Chromosomes per cell
Pairs per cell
A
46, 23
8
Q
Cystic fibrosis
A
Recessive
Affects lungs and pancreas
Causes a thick mucus buildup
Treatment, back Patting, enzymes, mucus nebuliser to thin mucus
9
Q
A
10
Q
Polydactyly
A
Dominant gene
Causes 1+ extra fingers or toes
11
Q
Old Greg
A
Gregor Mendel
Pea plant inheritance stuff
12
Q
Greg’s conclusions
A
- characteristics are determined by hereditary units
- Hereditary units are passed on to offspring unchanged, one unit from each parent
- Hereditary units can be dominant or recessive . If each is present the dominant unit is expressed
13
Q
Why was old Greg lame
A
Other theories accepted at the time
No knowledge of DNA or chromosomes
Mendel was not respected
14
Q
Dodo
A
15
Q
A
