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19 terms

Chapter 11

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Carrier
an individual heterozygous that is for a specific trait.
Pedigree
Graphic Representation of genetic inheritance used by genetics to map genetic traits.
Recessive Genetic Disorder
A recessive trait is expressed when the individual is homozygous recessice for the trait.
Cystic Fibrosis
The gene that codes for a membrane protein in defective
Albinism
Genes do not produce normal amounts of the pigment melanin
Galactosemia
Absence of the genes that codes for the enzyme that breaks down galactose.
Tay-Sachs Disease
Absence of a necessary enzyme that breaks down fatty substances
1. Huntingtons's Disease 2. Achondroplasia
Name some Dominant Genetic Disorders
Huntington's Disease
A gene affecting neurological function is defective
Achondroplasia
A gene that affects bone growth that is abnormal
Inferring Genotypes
What is it knowing physical traits that can determine what genes an individual is most likely to have
Predicting Disorders
Record keeping that helps scientists use pedigree analysis to study inheritance patterns, determine phenotypes, and ascertain genotypes.
Incomplete Domininance
Inheritance pattern where the phenotype of a heterozygote is intermediate between those of the two homozygote's
Codominnant Allele
The phenotypes of both homozygote's to be produced in heterozygous individuals
Multiple Alleles
Presence of more than two alleles for a genetic trait
Sex Chromosomes
Two chromosomes that determine the sex of an individual
Autosome
22 pairs of homologous chromosomes
Sex linked trait
Traits controlled by genes located on sex chromosomes
Polygenic trait
The inheritance pattern of a trait that is controlled by two or more genes