Evolution Sources of variation/ repeat

• Biologie
• Middelbare school
• vwo
• Leerjaar 4

What is the difference between phenotype and genotype?

Genotype vs Phenotype

Your genotype (the information in your DNA) will influence your phenotype (how you look). 

Because of that, your survival/fitness will increase/decrease.

From a biological perspective, how did Matt Fraser become the fittest man on Earth?

Continuous vs discontinuous variation

Continuous; gradually, lots of variation, environment influences survival

Discontinuous; cut-off groups, you're either 'this' or 'that', environment does not influence survival (mostly)

GENETIC VARIATION

An ejaculation of a healthy man consists of 200-500 million sperm cells. Independent assortment has led to a huge genetic variation. Will all possible gametes be present in this ejaculation?

MUTATIONS

What are the five sources of genetic variation?

Five types of genetic variation

1. Crossing-over

2. Independent assortment of chromosomes in meiosis

3. Random fertilization of gametes

4. Random mating

5. Mutations

Homework

Mandatory: Do the assignment on Worldviews and Evolution; write an essay of maximum one page.

Make the assignment on the Peppered Moth Game