29673_Medical Genetics

29673_Medical Genetics - Genetics Gene A unit of heredity...

Info iconThis preview shows pages 1–18. Sign up to view the full content.

View Full Document Right Arrow Icon
Genetics
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Gene A unit of heredity that controls the development of one trait Made of DNA
Background image of page 2
Allele Member of a paired gene One allele comes from each parent Represented by a single letter
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Dwarfism = D Normal height = d DD = Dwarfism Dd = Dwarfism dd = Normal height Examples of Alleles Dwarf Band
Background image of page 4
Dominant & Recessive Alleles Dominant alleles are expressed Recessive alleles are not expressed in the presence of a dominant allele Recessive alleles are only expressed if both recessive alleles are present
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Homozygous Both alleles alike AA or aa
Background image of page 6
Heterozygous Alleles are different Aa
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Genotype Genetic make up Represented by alleles DD & Dd are genotypes for dwarfism
Background image of page 8
Phenotype A trait Genotype determines the phenotype Dwarfism is a phenotype
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Codominant Two different alleles are both dominant A = allele for type A blood B = allele for type B blood AB = results in type AB blood
Background image of page 10
Karyotype Picture of chromosomes from an individual
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Homologous Chromosomes Chromosomes of the same pair Karyotypes are usually arranged with homologous chromosomes paired together
Background image of page 12
Mutation Change in a gene or chromosome Causes an abnormal trait
Background image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Mutagen Agent that causes mutations Cigarette smoke Pesticides X-rays Ulatraviolet light Nuclear radiation
Background image of page 14
Homologous chromosomes line up in a double file in metaphase I of meiosis
Background image of page 15

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Homologous Pairs Separate
Background image of page 16
Chromosomes
Background image of page 17

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 18
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 67

29673_Medical Genetics - Genetics Gene A unit of heredity...

This preview shows document pages 1 - 18. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online