Science Flashcards
What is the structure of a dna mole
The stucture is a double helix modle.
Where is DNA found.
DNA is found inside the nucleus of a cell.
Define the word gene
A gene is a section of a chromosome that code for a particular characteristic e.g. hair colour.
What is an allele?
An allel is an alternate form of a gene. E.g. if the gene is eye colour, the allele may be blue eyes, brown eye, green eyes.
What is the diffrence between dominant and recessive alleles.
Dominat is the bigger allele meaning that it is more likely to be the chosen option E.g. if the domant allele is blue and the recessive allele is green then there’s a higher chance of it being blue.
What are homozygous alleles.
Homozygous alleles are alleles that are the same. E.g. TT
What are heterozygous alleles.
Heterozygous alleles are alleles that are diffrent E.g. Tt.
Define phenotype.
the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.
What is a punnet square.
A punnet square is a table that show the chances of an allele being dominant ir ressesive
Name a genetically inherited disorder
Sickle Cell Disease.
Cystic fibrosis. Cystic Fibrosis Liver Disease.
Brain, Nerves and Spine. Huntington’s Disease.
Cleft lip and palate. Cleft Lip and Palate
Name three satellite orbits
Geostationary orbit, low earth orbit, polar orbit
Name a theory on how the earth was created.
The flat Earth, the geocentric model, heliocentricity, galacticocentricity, the Big Bang
What is the big bang.
The big bang is a theory on how the earth was made the theory tells us that it was made by a fireball exploding.
How long ago was the big bang.
14 BILLION years ago.
What orbit would boradcasting use.
Geostationary
What orbit does weather forecasting use
LEO or polar
What orbit does the international space station use.
LEO
What orbit a spy satellite use
Geostationary,polar or LEO.
