Human Genetics Flashcards
Determine the possible genotypes and phenotypes of the individuals
Pedigree analysis
Affected individual whom the pedigree is discussed
Proband
Common patterns of inheritance
Autosomal dominance
Autosomal recessive
Sex-linked dominance
Sex-linked recessive
Sex-influenced
The trait never skips a generation
Autosomal dominance
2 affected individual produced affected offspring
Autosomal recessive
Affected male with unaffected wife transmit the trait to daughter only
Sex-linked dominance
Affected female transmit the trait to son, daughter serves as carrier
Sex-linked recessive
Gene exhibits high penetrance or expressivity on one sex
Sex-influenced
One mutated copy of the gene in each cell is sufficient for a person to be affected
Give a disease example
Autosomal dominance
-Huntington Disease and Marfan Syndrome
Both copies of gene mutations
Give example
Autosomal recessive
Cystic fibrosis
Sickle cell disease
Caused by mutations in genes on the X chromosome
Give example
X-linked dominant
Fragile X syndrome
Mutations in X-chromosome of male
Give example
X-linked recessive
Hemophilia
Mutated gene that causes disorder in Y chromosome of males cell
Give example
Y-linked
Y chromosome infertility
Two different versions of a gene are expressed and each version makes a slightly different protein
Co-dominant
Also known as maternal inheritance
Mitochondrial inheritance
British physician that Described the Down Syndrome
J. Langdon Down
degenerative disorder of the human central nervous system in the progressive impairment of the memory
Alzheimer’s Disease
Describes Edwards Syndrome
John H. Edwards
Patau Syndrome is described by
Klaus Patau
Disorders associated in Sex Chromosome Aneuploidy or change in the number of sex chromosome
Klinefelter’s Syndrome
Turner’s Syndrome
Triple X syndrome
Double Y Syndrome
Hermaphroditism
Human disorders due to changes in chromosome structure
Cri-du-chat Syndrome
Muscular dystrophy
Robertsonian translocation
Philadelphia syndrome
A condition characterized by accumulation of galactose in blood
Galactosemia