NS 1300 Emergence of Modern Science
Patterns of Inheritance
How will the results of Human Genome Project change our
lives forever?
Chromosomes
Mendel’s Laws• Law of Segregation
- homologous - chromosomes
- gene pairs
- alleles
- homozygous- heterozygous
- gene loci
- gene frequency
Inheritance of a Single Trait• Genotype
• Phenotype
• Gamete Formation (meiosis)
Monohybrid Crosses
Dihybrid Crosses
Incomplete Dominance
Polygenic Inheritance
Multiple Alleles
Sex-Linked Inheritance
Chromosomal Mutations
Nondisjunction
Viruses• DNA Viruses
• RNA Viruses
• Retroviruses
• Adenoviruses
Quiz• 1. T or F, genes are found on chromosomes.
• 2. T or F, homologous chromosomes are segregated independently during meisosis.
• 3. T or F, sex-linked traits are determined by genes on the Y chromosome.
• 4. T or F, non-disjunction can produce birth defects.
• 5. Use this monohybrid cross to answer the following question:Where A represents aggression and aa lack of aggression. If A is completely dominant over a, what are the odds of having aggressive offspring from this cross?
A a X Aa
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