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Genetics Primer:SBI 4UI

Mrs. Tuma

Test Your Genetic IQ:

1. The Human Genome contains 3 billion base pairs.True or False?

Test Your Genetic IQ:

1. The Human Genome contains 3 billion base pairs.True or False?

Test Your Genetic IQ:

2. The human genome contains about 100 000 genes.True or False

Test Your Genetic IQ:

2. The human genome contains about 100 000 genes.True or False (It probably has about 15 000- 20 000 genes.)

Test Your Genetic IQ:

3. There are twice as many mutations in sperm versus ova.

True or False

Test Your Genetic IQ:

3. There are twice as many mutations in sperm versus ova.

True (ratio is 2:1) or False

Test Your Genetic IQ:

4. Your genes can be affected by past events and exposures of your ancestors.

True/False

Test Your Genetic IQ:

4. Your genes can be affected by past events and exposures of your ancestors.

True (epigenetics) /False

Test Your Genetics IQ:

5. Your genes have an impact on how certain therapeutic drugs may affect you.True / False

Test Your Genetics IQ:

5. Your genes have an impact on how certain therapeutic drugs may affect you.True / False

Some Basic Terms:

DNA : deoxyribonucleic acid -- what our inherited material is made of

-- in nucleus and mitochondrionRNA: ribonucleic acid – a close

copy of DNA

Some Basic Terms:

Gene: DNA sequence coding for particular characteristic

Allele: 2 different forms of the same gene

Homozygous: two of the same allele eg: AA or aa

Heterozygous: two different alleles e.g.: Aa

Some Basic Terms:

Dominant: when allele is present it is always expressed

Recessive: need 2 copies of allele for the trait– masked by dominant

Some Basic Terms:

Autosome: non-sex chromosomes (pairs 1-22)

Sex chromosome: 23rd pair of chromosomes XX or XY

Some Basic Terms:

Some Basic Terms:

Chromatin: fibres of DNA that make up chromosomes

Chromosome: strands of nucleic acids and histone proteins

Chromatid: individual chromosome strand

The End!