4.3 Diversity And Meiosis

Question 1

What is crossing over?

Answer 1

During meiosis 1 the homologous chromosome is come together and power at the chromatids twist around each other and bits of the code swapped

Question 2

What is independent segregation of chromosomes?

Answer 2

When the homologous pairs are separated it is completely random so the combinations are different

Question 3

What is the substitution mutation?

Answer 3

One base is substituted with another

Question 4

What is the deletion mutation

Answer 4

One of the bases is removed

Question 5

What happens in meiosis?

Answer 5

Before meiosis the DNA unravels and replicates
In meiosis one chromosomes arrange themselves into pairs
The pairs are then separated halving the chromosome number
In meiosis two pairs of chromatids that make up each chromosome are separated and the centromere is divided
For haploid cells that are genetically different are produced