Biology what i need for thursday Flashcards
What is deforestation?
The clearance of trees from an area that will be used for other purposes, commonly farming or urban use.
What is a genome?
A genome is one copy of all the DNA found in an organism’s diploid body cells - that is, its entire genetic material.
What is Cystic fibrosis?
A genetic disorder in which those affected inherit a recessive allele from both parents. Diseases that we inherit from our parents are called inherited disorders.
Explain how cutting down trees affects the environment.
Trees take in CO2 for photosynthesis, this reduces the amount of CO2 in the atmosphere. Fewer trees mean less photosynthesis leading to less CO2 being removed from the atmosphere. Trees that are cut down are usually burnt, this increases the greenhouse effect by releasing the CO2 in the trees into the atmosphere, therefore increasing global warming. Also if you cut down lots of trees some species of trees could go extinct, which decreases bio-diversity.
What is IVF?
It is a process of fertilization where an egg is combined with sperm outside the body.
What are punnet sqaures?
The Punnett square is a tabular summary of possible combinations of maternal alleles with paternal alleles.
How would you describe the structure of DNA?
Your genetic structure is made from DNA, a polymer that consists of two strands that form a double helix (a twisted ladder).
What is DNA and what does it do?
The code in your DNA tells your body how to make proteins. These are things such as enzymes and hormones. These proteins define who you are, your height, your eye color, and your blood type for example.
What is the variation?
The difference that exists between within a species or between different species.
Give three causes of variation
Environmental factors, genetic factors, and a combination of both, how your genome interacts with the environment.
What is an example of environmental variation?
How your appearance changes due to any scars or tattoos that you get.
What is genetic engineering?
A scientific technique in which a gene is moved from one organism to another to gain a desired characteristic.
Give two examples of variation which is both genetic and environmatal?
Your weight and height.
What is continuous data?
Data that come in a range and not a group
What is discontinuous data?
Data that come in groups and not a range
