Unit 1- human lifespan development - Genetic factors - Flashcards in BTEC National Health & Social Care

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Created by: neb_x
Created on: 13-05-18 16:19

Genes

sets of instructions to the cells that determinegrowth and development.

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Chromosones

Contain genes. - 23 pairs; one from each parent.

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Dominant genes

Need only one defective dominant gene (from one parent) for child to get disease.

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Dominant gene diseases

Brittle bones disease; causes bones to break wasily. - Hutingtons disease; Causes involuntary movement, cognitive and psychiactric disorders.

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Recessive genes

Must be passed on from both parents for child to develop the condition.

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Recessive gene diseases

Cystic fibrosis (build up of thck mucous and can damage lungs) - Phenylketonuria PKU (causes intelectual disability and developmental delay) - Duchenne muscular dystrophy (causes muscle weekness and wasting --> difficulty with motor skills and walkin

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Recessive c=gene disease carriers

If recessive disease gene is passed from only one parent child becomes a carrier.

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Chromosone diseases

Downs syndrome, klinefelter syndrome, colour blindness.

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Downs syndrome

Caused by extra copy of chromosone 21. Causes facial characteristics, growth delay and intellectual disability.

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Klinefelter syndrome

Bpys have extra X chromosone, causing problems during or delay puberty.

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Colour blindness

Caused by mutations in X chromosone so is more common in males. Makes it difficult to distinguish colours.

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Genetic susceptibility to disease

An increased liklihood of developing a disease due to an individuals genetic makeup. Can lead to cancer, high cholesterol, diabetes.

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Other factors affecting liklihood of disease

Environmental factors, Lifestyle, Life events, Availability og preventative treatements.

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Other cards in this set

Card 2

Front

Contain genes. - 23 pairs; one from each parent.

Back

Chromosones

Card 3

Front

Need only one defective dominant gene (from one parent) for child to get disease.

Back

Card 4

Front

Brittle bones disease; causes bones to break wasily. - Hutingtons disease; Causes involuntary movement, cognitive and psychiactric disorders.

Back

Card 5

Front

Must be passed on from both parents for child to develop the condition.

Back

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Unit 1- human lifespan development - Genetic factors