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Title: genotype and phenotype
Description: alevel and undergrad students. defines these two terms and outlines genetic conditions such as PKU. also outlines monozygotic and dizygotic twins. good for AQA psychology students or OCR human biology.
Description: alevel and undergrad students. defines these two terms and outlines genetic conditions such as PKU. also outlines monozygotic and dizygotic twins. good for AQA psychology students or OCR human biology.
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GENOTYPE
AND
PHENOTYPE
Genotype refers to an individuals genetic make-up, that is
particular of the genes they possess
...
Genotype + environment = phenotype
E
...
The 1
with the better diet would be bigger and healthier, this is an
environmental factor e
...
THE DISORDER PKU
A deficiency in the enzyme phenylalanine hydroxylase (PAH)
PKU is a recessive genetic disorder which means that each
parent has to have at least 1 defective gene for PAH which
the child then inherits
...
A child who has parents who both have PKU will definitely
get PKU
PKU if undetected and untreated at birth can lead to a child
not accomplishing import developmental milestones
...
DISTINCTION BETWEEN
GENOTYPE/PHENOTYPE
Haemophilia is a recessive genetic disorder that impairs the
body's ability to blood clott
...
g Bb) individual is a carrier
...
A homozygous ( The genotype consists of 2 genes that are
the same e
...
A homozygous recessive person has an abnormal phenotype
and will pass the gene onto offspring
...
g identical twins occur when 1 egg is
fertilised by 1 sperm and forms 1 zygote
...
DNA 100% same
...
Dizygotic twins e
...
50% DNA
Psychologists are interested in studying twins to investigate
their genetic basis of behaviour
Title: genotype and phenotype
Description: alevel and undergrad students. defines these two terms and outlines genetic conditions such as PKU. also outlines monozygotic and dizygotic twins. good for AQA psychology students or OCR human biology.
Description: alevel and undergrad students. defines these two terms and outlines genetic conditions such as PKU. also outlines monozygotic and dizygotic twins. good for AQA psychology students or OCR human biology.