Key Area 4: Variation and Inheritance Flashcards
1
Q
What are the two types of variation?
A
Discrete (single gene, distinct groups) and continuous (polygenic, range of values).
2
Q
Give an example of discrete variation.
A
Blood group, tongue rolling.
3
Q
What is a genotype?
A
The combination of alleles inherited (e.g., Bb, AA).
4
Q
What is a phenotype?
A
The physical appearance of an organism.
5
Q
Why do predicted phenotype ratios differ from actual ratios?
A
Because fertilization is a random process.
