Genetics Flashcards
What year was the human genome mapped
2003 - all 70-100,000 genes were identified
How many gene disorders were discovered due to the HGP
7000
the hgp was federally funded t or f
true
what is genetics
characteristics inherited from parents
how many chromosomes
46 (23 pairs) = 22 body cells(autosomes); 1 sex cell
what are genes
hereditary info at a particular site on a chromosome
what is a genome
total genetic makeup
alleles
different genes for same trait (blood type, color of hair)
homozygous
inherits same alleles from different parents
heterozygous
two different genes; one recessive, one dominant
karotype
picture of genes, map
only 1 copy of an abnormal x-linked recessive gene is enough to produce that characteristic in a male t or f
true
males have what chromosomes
x and y
1 copy of a dominant gene is enough to cause that characteristic to be expressed t or f
true
2 copies of a recessive gene are needed to cause a characteristic to be expressed t or f
true
females have xx chromosomes t or f
true
autosomal dominant disorders
albino, dwarf, huntingtons, polycystic kidney disease
autosomal recessive disorders
tay sachs, cystic fibrosis, sickle cell anemia
x-linked recessive disorders
color blindness, hemophilia, muscular dystrophy
x-linked dominant disorders
fragile x
multifactorial disorders
cleft palate
cardiac defects
caused by combo of genetic/environmental fxrs
dx
ultrasound
amniocentesis
chorionic villus
chromosomes can be analyzed from
wbc, bone marrow, or fetal cells
