Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Key Area 2.4
Revision for Key area 2.4 Variation and Inheritance
| Question | Answer |
|---|---|
| What is discrete variation? | Discrete variation is where a characteristic fall into distinct groups |
| Give 2 examples of discrete variation | Hair colour, Eye colour, tongue rolling etc |
| What is continuous variation? | Is where a characteristic can have any value in a range |
| Give 2 examples of continuous variation | Height, weight, foot length, shell length etc |
| Which type of variation is polygenic? | Continuous variation |
| Define polygenic | Characteristic is controlled by many genes |
| Define Phenotype | The physical characteristics that an organism possesses |
| Define genotype | The genes that an organism possesses |
| What are different forms of a gene called | Alleles |
| Define the term 'true breeding' | Organism that can only pass on one type of allele to offspring (homozygous) so if crossed with an organism who has the same genotype as them, all offspring have same phenotype as the parents |
| Define homozygous | The two alleles of the gene are the same (e.g. DD or dd) |
| Define heterozygous | The two alleles of the gene are different (e.g. Dd) |
| Dominant genes are presented a which type of letter : lowercase or capital | Capital letter |
| Why is the expected ratio for offspring often different from the observed ratio? | Fertilisation is a random process |
| To predict the genotype of offspring, what diagram shpuld you use? | Punnett square |
Created by:
MissBryce
Popular Biology sets