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Biology Final part 1

questions to study for test

QuestionAnswer
Fraternal twins 2 individual eggs fertilized
Identical twins start as 1 egg - duplicating at first division
Sex LINKED traits traits carried on the sex chromosome
sex LIMITED traits traits EXPRESSED only in the presence of the sex hormones.
non-disjunction abnormal segregation of sex chromosome
sex chromosomes determine sex
autosomes chromosomes which determine body characteristics
down syndrome mongoloids - extra 21st chromosome
Klinefelters syndrome xxy
turner's syndrome x has unusual features, will need hormone therapy
mosaics xxy-xxxx tragic in humans (usually leads to miscarriage)
crossing over exchange of genes between chromosomes
gene linkage arrangement of genes on the chromosome
Mutation change in genetic code
mutagens somatic - in the body germ - in the sex cell
nystagmus constant eye oscillation
hemophilia bleeders disease
myopia nearsightedness
mitral stenosis heart murmur
pollution *no answer*
Created by: lorinfeiden
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