What is inheritance?. The Royal Family Inherited Characteristic or Not? Hair ColourLeft or Right Handed Eye ColourAbility to roll tongue HeightBlood.

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Presentation transcript:

What is inheritance?

The Royal Family

Inherited Characteristic or Not? Hair ColourLeft or Right Handed Eye ColourAbility to roll tongue HeightBlood Group WeightSex FrecklesHair Length Attached Ear LobesAbility to play football AllergiesAbility to play computer games TatoosDimples

Inheritance Many characteristics of living things are determined by genes inherited from our parents. But a gene can have different forms; these are called alleles. gy/cells_and_dna/genetics

Alleles Different forms of the same gene… GeneAlleles Eye colour Fur colour Flower colour Ear shape Wing shape

Chromosomes: chromosomes are large pieces of DNA. Humans have 23 pairs of chromosomes in most cells. Genes: genes are sections of chromosomes, each codes for a different characteristic e.g. blood type, eye colour, etc. Alleles: different forms of the same gene GeneAlleles Eye colour Blood type Ear shape Flower colour

Phenotype This is what an organism looks like… Green eyes Brown hair Short height Lobbed ears

Genotype This is the forms of a gene an organism carries in its DNA Dad: Blue EyesMum: Green Eyes Me: Green eyes Phenotype: Green Eyes Genotype: I carry a green and blue eyed gene

Eye Colour – Freaky Baby /471/eyecolour.swf

Dog Genotype and Phenotype Activity

Links tree.swf tree.swf bloodgroups.swf bloodgroups.swf offspring.swf offspring.swf tongue-rolling.swf tongue-rolling.swf rollover-tree.swf rollover-tree.swf