Genetics-The Study of Heredity
Genes usually occur in pairs and are often represented by letters. There are 3 possible
combinations of a pair of letters.
Homozygous/ Pure-2 identical genes in the pair
Heterozygous/ Hybrid-Contrasting genes in the pair
How to Use a Microscope
Turn the revolving turret (2) so that the lowest power objective lens
(eg. 4x) is clicked into position.
Place the microscope slide on the stage (6) and fasten it with the
Look at the obje
Transcription and Translation:
Protein Synthesis is the making of proteins, using the info that is found in DNA (Chromosomes)
RNA is different from DNA:
1) RNA is single strand of nucleotides.
Chromosome Structure Abnormalities:
1) Mutation- Change in Genetic Material
2) 4 Types of Mutations:
Deletion- Fragment breaks off and is lost
Duplication- Fragment breaks off and attaches to homologous chromosome
DNA- Deoxyribonucleic Acid-the molecule of heredity
Structure of DNA nucleotides- deoxyribose sugar, phosphate group, nitrogen base
4 Bases-adenine, guanine, cytosine, thymine
Type of Bases-Purines-double ring bases (Adenine and Guanine) and Pyrimidines-s