geneticcs - Genetics and the Life Span Why is genetics...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Genetics and the Life Span • Why is genetics important to life-span development? Genetic Foundations • What is the difference between phenotype and genotype ? • Whether or not a particular characteristic is expressed is often determined by our genotype (Dominant-Recessive Inheritance) • Ex: Curly Hair, Facial Dimples Genetic Material and Processes • Material: – Chromosomes • 23 pairs (22 pair autosomes, 1 pair sex) –Gene • Alleles • Homozygous vs. Heterozygous – Deoxyribonucleic acid (DNA) • Processes: – Mitosis – Meiosis • Gametes • Zygote
Background image of page 1

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

View Full DocumentRight Arrow Icon
2 Dominant-Recessive Inheritance •The dominant allele determines phenotype, whereas the recessive allele does not affect phenotype. However, if have 2 recessive alleles, that genotype will be expressed. VERY FEW diseases that have a dominant inheritance. Why? Ex: Huntington Disease Ex: Phenylketonuria (PKU), Curly Hair, Facial Dimples, Type A vs. Type O Keep in Mind: Parent can be carriers (heterozygous) X-Linked Inheritance • Phenotypes related to traits carried on the X chromosome. •Males are more susceptible,
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/17/2008 for the course PSYCH 230 taught by Professor Steele during the Spring '08 term at Radford.

Page1 / 7

geneticcs - Genetics and the Life Span Why is genetics...

This preview shows document pages 1 - 3. Sign up to view the full document.

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