A dominant allele will always be expressed, even if there is only one. (TT, Tt)
2 of 21
What is a recessive allele?
A recessive allele will only be expressed if there are two of them. (tt)
3 of 21
What are HOMOZYGOUS alleles?
Two of the same (TT or tt)
4 of 21
What are HETREOZYGOUS alleles?
Two different (Tt)
5 of 21
What is a GENOTYPE?
Which alleles are present (TT, Tt, tt)
6 of 21
What is a PHENOTYPE?
The interaction of the genotype and the environment.
7 of 21
What sort of allele is POLYDACTYLY caused by?
Dominant alleles (TT or Tt)
8 of 21
What sort of allele is CYSTIC FIBROSIS caused by?
Recessive alleles (tt)
9 of 21
How many chromosomes does a human body cell have?
23 chromsomes.
10 of 21
What are the female sex chromosomes?
**
11 of 21
What are the male sex chromosomes?
XY
12 of 21
What is the equation for photosynthesis?
6 CO2 + 6 H2O --------> C6H12O6 + 6 O2
13 of 21
What are some limiting factors?
CO2, Temperature, Water (though these may interact!)
14 of 21
What are some reflex arcs?
Sensory Neurone, Relay Neurone, Motor Neurone,
15 of 21
What are synapses?
They are the gaps between nerves that pass the chemical messengers (hormones/reflexes) of the body around.
16 of 21
What is negative feedback?
A process by which the body returns the system to an optimum state.
17 of 21
What is 'Type 1' Diabetes?
When the body cannot produce enough insulin (can be treated with insulin injections).
18 of 21
What is 'Type 2' Diabetes?
When the body does not react to the insulin produced by the cells (as a consequence of an unhealthy lifestyle, can be treated by returning to healthier ways).
19 of 21
What is glucagon?
Glucagon causes glycogen to be converted into glucose.
20 of 21
What is asexual reproduction?
When reporoduction invovles only one parents and includes no fusion of cells - essentially the making of a clone. (More time and energy efficient)
21 of 21
Other cards in this set
Card 2
Front
What is a dominant allele?
Back
A dominant allele will always be expressed, even if there is only one. (TT, Tt)
Comments
No comments have yet been made