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Inheritance Assessment Presentation Transcript

Slide 1 - Genetics and inheritance Aim: To recall the important terms that relate to genetics and inheritance (KS4) Describe the basic structure of DNA
Slide 2 - In your own words, explain the following terms Chromosome Gene Features Gametes Zygote Diploid Allele Homozygous Heterozygous Selective breeding Genetic engineering Meiosis Mitosis Sexual reproduction Asexual reproduction Mutations Dominant Recessive
Slide 3 - chromosome The instructions that tell cells what we look like are carried in these. There are 23 pairs of them in a normal human cell.
Slide 4 - Genes These are the units which make up chromosomes. Responsible for inheritance of specific characteristics
Slide 5 - FEATURES These are things like eye colour, skin colour and hair colour. They are controlled by genes.
Slide 6 - gametes Sperm and egg cells are both this type of cell. Contain half the amount of DNA of normal diploid cells
Slide 7 - zygote When a sperm and egg cell fuse together, they produce this.
Slide 8 - diploid We use this word to describe cells which contain the full complement of genetic material. In humans this would be 46 chromosomes (23 pairs)
Slide 9 - alleles The different versions of genes
Slide 10 - Homozygous Alleles of a given gene are identical (can be either dominant or recessive
Slide 11 - Heterozygous Alleles of a given gene are not identical
Slide 12 - selective breeding Where plants and animals with useful or desired traits are bred together to produce offspring with those desired traits
Slide 13 - Genetic engineering The altering of the character of an organism by inserting genes from another organism
Slide 14 - mitosis Division of a cell to produce 2 daughter cells which each has the same number and kind of chromosomes as the mother cell
Slide 15 - sexual reproduction Type of reproduction that involves fusion of gametes
Slide 16 - asexual reproduction Reproduction whereby individuals are produced from a single parent
Slide 17 - Mutation Random change in the genetic material of the cell
Slide 18 - dominant The allele that is expressed where an individual is heterozygous
Slide 19 - recessive The allele that is ‘hidden’ (not expressed) when an individual is heterozygous for a given gene
Slide 20 - Where is it?
Slide 21 - What does it look like?
Slide 22 - This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.