GENETIC INFLUENCES ON PRENATAL DEVELOPMENT
Condition
Gender
Description
Determined by the
fertilisation of an x cell from
the mother and x or y cell
from the father
Inherited
Determined by the genetic
Characteristic make-up of both parents
s
Down
Also called Trisomy 21.
Syndrome
Condition where extra genetic
material causes delays in
development both mentally
and physically
Cant be prevented
Extra chromosome total of 47
not 46
Haemophilia
Rare blood disorder caused by
inherited gene
Lack blood clotting factor
Mainly in males- carried on X
chromosome
Need special first aid for
injured muscles or joints
Coeliac
Digestive condition resulting
Disease
in intolerance of gluten
products
Effects
xx female child
xy male child
References/URL
http://www.biologyonline.org/2/6_sex_chromosomes.htm
hair and eye colour, face shape,
hair type, height & build, etc…
http://www.bbc.co.uk/schools/gcsebitesize/s
cience/ocr_gateway_pre_2011/ourselves/7_w
ho_am_i1.shtml
http://kidshealth.org/parent/medical/genetic
/down_syndrome.html#
Flat facial profile, upward slant
to eyes, small ears, protruding
tongue, low muscle tone, reach
milestones later than other
children
Ability to learn, mild to
moderate intellectual impairment
Prone to bleeding especially
internally
Can lead to chronic pain and
arthritis
http://www.betterhealth.vic.gov.au/bhcv2/b
hcarticles.nsf/pages/Haemophilia?open
Immune reactions in small
intestines
Affects the body’s way of
absorbing nutrients from food
Destroys small intestines inner
surface
http://www.coeliacdisease.com.au/
GENETIC INFLUENCES ON PRENATAL DEVELOPMENT
Condition
Sickle-Cell
Anemia
Tay-Sachs
Disease
Colour
Blindness
Cystic Fibrosis
Klinefelter’s
Syndrome
Description
Inherited blood disorder
mostly affects people of
African ancestory.
Does occur in ethnic groups
Rare fatal genetic lipid
storage disorder
Harmful qualities of a fatty
substance called Ganglioside
builds up in tissues and nerves
cells in brain
Have difficulty with colours
green, yellow, orange, red
Lack of specific coloursencitive cells in eye
Inherited
More boys affected than girls
Life threatening genetic
disorder
No cure, but medication to
help
Known as XXY Condition
Males who have an extra X
chromosome in most cells
Instead of usual XY
Most common chromosome
Effects
Affects hemoglobin, protein
found in red blood cells
Suffer from anemia
References/URL
http://kidshealth.org/teen/diseases_conditio
ns/blood/sickle_cell_anemia.html#
Development slows, muscles
weekend, loses motor skils,
seizures, visions, hearing loss,
intelectuall disability, paralysis
http://www.ninds.nih.gov/disorders/taysachs
/taysachs.htm
See colours differently than
others
Noticed around 4 yrs old
http://www.betterhealth.vic.gov.au/bhcv2/b
hcarticles.nsf/pages/Colour_blindness
Affects lungs reproductive
system and digestive system
http://www.betterhealth.vic.gov.au/bhcv2/b
hcarticles.nsf/pages/Cystic_fibrosis
Physical development
Slightly different when puberty
hits
Language & social development
http://www.nichd.nih.gov/health/topics/klin
efelter_syndrome.cfm
http://ghr.nlm.nih.gov/condition/tay-sachsdisease
abnormality in humans