B1 - You And Your Genes

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  • Created by: cjulie11
  • Created on: 26-04-16 10:37
What do genes do?
they control how an organism will develop they also tell the cell how to make essential proteins
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name a functional protein
enzymes
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name a structural protein
collagen
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name the 3 things that determine human charecteristics and give an example of each
genes - dimples environment - scars combination of both - body weight
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what does a genotype determine?
what someones genes will be
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what does a phenotype determine?
what features someone will have
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give examples of a genetic diagram
a punnett square and a family tree/pedigree
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explain the difference between homozygous and heterozygous
homozygous - 2 of the same alleles eg. bb heterozygous - 2 different allelles eg. Bb
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what are the sex chromosomes of a male and a female?
male - XY female - XX
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which parent determines the gender of any offspring?
the father does, the mother will always pass on an X chromosome
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where are genes found?
found in the nucleas of cell sections of DNA molecules that make up chromosomes
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what do punnett squares and family trees show?
the risks of having a genetic disorder or being a carrier
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how many faulty genes must someone have to be a carrier?
they would have to have 1 recesssive gene
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how many faulty genes must someone have to have a disorder?
1 or 2 dominant genes or 2 recessive genes
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what does IVF stand for?
invitro fertilisation
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what does PGD stand for?
pre-implantation genetic diagnosis
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list the implications of pre-natal genetic tests
*risk of miscarriage *not 100% reliable *moral decisions
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what is the difference between genetic testing and genetic screening?
genetic testing is when you know theere is a family history of a certain condition whereas genetic screening is of a much larger scale where there isn't a family history of a condition
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state the difference between adult stem cells and embryonic stem cells
embryonic stem cells are unsepcialised so can be used for anything and have great potential in disease treatment whereas adult stem cells are specialised so can only be used for certain things
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how is an artificial clone produced?
nucleas removed from a body cell and is implanted to an unfertilised egg, where the egg is manipulated to believe that the nucleas is sperm
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give an example of an artificial clone
dolly the sheep
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how can a natural clone occur?
from either asexual reproduction or when a fertilised egg splits (otherwise known as identical twins)
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give an example of a dominant genetic disorder and a recessive genetic disorder
dominant - huntingtons recessive - cystic fibrosis
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I am a carrier for cystic fibrosis and my partner isn't, what are the chances our children will have it or will be carriers?
there is a 50% chance they will be carriers and 0% chance that they will have it
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Other cards in this set

Card 2

Front

name a functional protein

Back

enzymes

Card 3

Front

name a structural protein

Back

Preview of the front of card 3

Card 4

Front

name the 3 things that determine human charecteristics and give an example of each

Back

Preview of the front of card 4

Card 5

Front

what does a genotype determine?

Back

Preview of the front of card 5
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