PSYC 372 Lecture 11: Psych_372_-_Lecture_11
17 May 2020
School
Department
Course
Professor
Michael Le
ARC
Psych 372
Child Development
● The Very Beginning: The Cell
○ Cell, cytoplasm, nucleus, etc.
○ What do the genes do for us?
■ DNA & (ATGC) twisting double helix
■ 25,000 genes control chemical reactions; but how do they do that?
● Biochemical microscopic environment
○ Genes
■ Copy of gene messenger (mRNA)
● Copies DNA code and brings out to ribosome (in structure of
cytoplasm of the cell)
● Lays in that groove, puts up the 3 codes (transfer of triplet codes)
● Circulating in the cytoplasm are transfer RNAs
● Only those who connect are matched codes (ex: ATA and ATA
connect)
■ DNA codes for a sequence of amino acids (AT & GC)
● Determines the order of the amino acids mRNA copying it
transfer RNA
■ Mitosis: a unique feature of DNA in that it can duplicate itself (pg.
72)
● Permits a single cell, formed at conception, to develop into a
complex human being composed of a great many cells
● During mitosis, the chromosomes copy themselves. As a
result, each new body cell contains the same number of
chromosomes and the identical genetic information
● Chromosome: a rod-like structure which stores and
transmits genetic information (pg. 72)
● Terms
○ Polygenic: many genes
■ Brain configuration, intelligence, behavior, personality, characteristics,
etc. are configured with many genes
○ Homozygous: when both the genes are the same (bb / BB)
○ Heterozygous: mixed genes (Bb)
○ Sex-linked characteristics: things linked to particular sexes (found in one sex
more than the other) and are usually found in men more than women [women tend
to be carriers (discussed later)]
■ Ex: 1 Hemophilia: when you’ve nicked your skin it can’t clot
● Diminished in the mating pool because they’re carrying this
deleterious gene
■ Ex: 2 Color blindness
○ Phenotype: what you see; gene and environment interaction
Document Summary
Copies dna code and brings out to ribosome (in structure of cytoplasm of the cell) Lays in that groove, puts up the 3 codes (transfer of triplet codes) Circulating in the cytoplasm are transfer rnas. Only those who connect are matched codes (ex: ata and ata connect) Dna codes for a sequence of amino acids (at & gc) Determines the order of the amino acids mrna copying it transfer rna. Mitosis: a unique feature of dna in that it can duplicate itself (pg. Permits a single cell, formed at conception, to develop into a complex human being composed of a great many cells. As a result, each new body cell contains the same number of chromosomes and the identical genetic information. Chromosome: a rod-like structure which stores and transmits genetic information (pg. Brain configuration, intelligence, behavior, personality, characteristics, etc. are configured with many genes. Homozygous: when both the genes are the same (bb / bb)
