Gentics Flashcards
who was rosalind franklin and how did her work relate to the work of watson crick
a british biophyscist and xray crystallographs.She and Maurice Wilkins worked together and took some x-rays of DNA. The DNA crystallography allowed Watson and Crick to look at the picture to determine it crystallography allowed Watson and Crick to look at the picture to determine that was a double helix and not a triple helix as Linus Pauling had thought.
Describe the Watson-crick model of DNA
Double helix structure
what is mitosis
Two daughter cells same number of cells
Genetically identical cells.
For new cell replacing old or for repair of damaged tissue and for growth, mitosis is every cell in the body contain identical genes
what is meiosis
a type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores.
For reproduction cells with only half the number of chromosomes are need
what is karyptyping.
to test the number of chromosomes and apeerances
how are the following linked DNA, chromosomes, genes
crhomosomes are made up of DNA and proteins. Genes are stretches of DNA that cointains code to make Proteins. DNA is a molecule made up of a sequence of nucletides
name three genetic disorders
down syndrome, sickle cell disease & colour blindness
whats causes a genetic disorder
caused b a whole or part by a change in DNA sequence away from a normal sequence
phenotype means
how living things apear and function E.g physical element eye colour, vocie sound
Genotype means
coding and combinding makes phenotype E.g gene responsible for Eye colour, vocie sound
what is the relationship between genetics and envrionmantal factors
influence the features of an organism the genetics provide the “blue print” and the enviroment modifies the feature
biotechnology
is the development of techniques for the application of biological processes
what are examples of biotechnology
fementing, bacterial treatment- milk to cheese, using yeast, gene spicing
2n
The diploid chromosome number is present
Alleles
are the different types of genetic material that code for a specific protein - or gene
