B1_Biology_Summary_Topic_1

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B1 Topic 1 Classification, Variation and Inheritance

This topic looks at:

• General characteristics of animals and plants

• Problems surrounding classification

• Adaptations of organisms that can survive in extreme environments

• Variation, inheritance and Darwins theory of evolution

Organisms have adapted to live in extreme environments, what are two examples of these?

1.

2.

Why is classification important?

Describe the characteristics of organisms within the FIVE vertebrate kingdoms a) b) c) d) e) d) e) b) c)

State the 5 kingdoms and their characteristics used to classify ALL organisms a)

Keywords:

Identification Key

Draw an identification key for bat, dragonfly, eagle and fly.

Classification of veterbrates

What terms are used to describe vertebrates and what they mean

Which species are hard to classify

B1 Topic 1 Classification, Variation and Inheritance

This topic looks at:

• General characteristics of animals and plants

• Problems surrounding classification

• Adaptations of organisms that can survive in extreme environments

• Variation, inheritance and Darwins theory of evolution

What factors cause variation?

1.

2.

Variation in a species can be grouped into two types

Explain, give examples and draw a graph for each type of variation

Describe the 6 steps of Darwin's theory of evolution by natural selection

Genetic Variation Draw punnet squares or genetic cross diagrams

1. Explain how brown eyes parents can have a blue eyed child

What do these keywords mean?

Chromosome

DNA

Genes

Alleles

Recessive

Dominant

Heterozygous homozygous

Phenotype

Genotype

Keywords: evolution, monohybrid inheritance

2. Show the phenotype and genotype for a cat heterozygous for colour and recessive for white.

3. Brown eyes are dominant over blue eyes. A homozygous dominant male mates with a heterozygous female

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