PS100 Lecture Notes - Lecture 3: Weight Gain, Heredity, Thalidomide
Developmental Psychology - Lecture 3
Assignment Due - Next week
- Hard copy and online copy to Blackboard
- Staple marking key to back of assignment
- Unit outline information - download coversheet
- Make sure to view requirements
- Reference list - ONLY the 3 references on blackboard and the text book (2x Journal articles and text
book)
- 2 Discussion questions - Complexity of thought and critical thinking - More detailed question and ask
more qualitative ways - ‘to what extent’ ‘why is there a disparity’ - lack of funding in some areas but
more funding in others
- In text references to avoid plagiarism
- Don't need to repeat in text citation as long as you refer to authors name
Learning Objectives:
- Genetic inheritance and the transmission of genetic differences
- Influence of genetics and environment
- Prenatal development and risks
- The birth process
Mechanisms of genetic transmission
- Gametes
sperm
ova
contributes to meiosis
- Genes
Chromosomes
- Mitosis
Cell production and replication
- Dominance – recessitivity
- Mendel 1860’s (eye colour)
- Examples of Dominance
- AB blood group
- Additive effects = compromise
- Eg - Cow
- Sex linked traits
- Genetic counselling
Meiosis
Mitosis
find more resources at oneclass.com
find more resources at oneclass.com
Genotype and Phenotype
- Genotype
Set of inherited traits
Inborn capacity or potential
- Phenotype
Traits as displayed or expressed
Combination of genotype and modifying experiences
Genetic Expression
- Dominant genes
Always expressed in phenotype
e.g., brown eyes, curly hair, facial dimples, type A blood, Huntington’s disease
- Recessive genes
Must be paired with another recessive gene to be expressed
e.g., blue eyes, colour-blindness, baldness, type O blood, PKU
Genetic Variation
- Alleles
Alternate genetic forms
- Homozygous
Alleles for particular trait are identical
- Heterozygous
Alleles for particular trait are different
- Co-dominance
Both alleles expressed
- Polygenic traits
Affected by many genes and environment
Genetic transmission of eye colour
Determination of Sex
- Ova - X ; Sperm - X or Y
- Sex of zygote determined by which type of
- sperm fertilises the ovum.
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Hard copy and online copy to blackboard. Staple marking key to back of assignment. Reference list - only the 3 references on blackboard and the text book (2x journal articles and text book) Don"t need to repeat in text citation as long as you refer to authors name. Genetic inheritance and the transmission of genetic differences. Always expressed in phenotype e. g. , brown eyes, curly hair, facial dimples, type a blood, huntington"s disease. Must be paired with another recessive gene to be expressed e. g. , blue eyes, colour-blindness, baldness, type o blood, pku. Ova - x ; sperm - x or y. Sex of zygote determined by which type of. Optimal phenotypical expression of genotype depends on environment. Nature: genetic variability meiosis + chromosome selection. Nurture: niche picking + range of reaction principle. Range of reaction e. g. huntington"s disease e. g. congenital heart disease. Substance or environmental influence that can interfere or damage embryonic growth.
