Topic 3 Flashcards Preview

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Flashcards in Topic 3 Deck (10):
1

Define Zygote

A fertilised female egg

2

What is DNA made of?

Repeating polymers called nucleotides

3

What does a nucleotide consist of?

One sugar molecule, one phosphate molecule and one base

4

Why is it useful to use salt when extracting dna from fruit cells?

It makes the DNA stick together.

5

Define Allele

Different versions of the same gene

6

Define Homozygous

When an individual has two of the same alleles

7

Define Heterozygous

When an individual has two different alleles for a gene

8

Define genotype

The combination of Alleles you have

9

Define Phenotypes

Your physical characteristics

10

Why does sexual reproduction result in genetic variation in a population?

Because there are different combinations of genes