C-26 Genetics Packet. What are most homologous chromosomal pairs called? Homozygous or Pure.

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Presentation transcript:

C-26 Genetics Packet

What are most homologous chromosomal pairs called? Homozygous or Pure

What are sex chromosomes? Chromosomes which determine if you are a male or female.

What code represents a male? XY

What code represents a female? XX xuF9YW38

Sex Linked Traits What are sex linked traits?  Traits located on the sex chromosome What two traits are related to sex linkage?  Color blindness and hemophelia

Gene Linkage What is gene linkage?  Two different traits on the same chromosome. True of False?  Eye and hair color are a product of gene linkage…

Crossing Over What is crossing over?  Alleles become separated When does crossing over occur?  During meiosis (gamete creation) True or False?  Crossing over REDUCES variation

Multiple Gene Inheritance What is multiple gene inheritance?  A group of genes that influence a physical characteristic What is an example of multiple gene inheritance?  Human height

DNA What is it?  Deoxyribose Nucleic Acid What is its shape?  Double helix Who identified the DNA molecule?  Miescher (1869) and Levene (1919) 5 Carbon Sugar?  Deoxyribose

Nitrogenous Bases Guanine – Cytosine Adenine – Thymine A-T C-G

RNA What is RNA?  Replicated DNA What is the function of RNA?  To copy the DNA code RNA vs. DNA:  DNA: Double Helix  RNA: Half of DNA chain

RNA What is messenger RNA?  Transfers RNA from Nucleus to the ribosome What is transcription?  Copying DNA into mRNA in gene expression What is a codon?  3 base system that codes for enzymes

RNA What is transfer RNA?  Transfers RNA to the ribosomes for protein synthesis What is its function?  To create an amino acid sequence for enzymes What type of RNA is connected with the ribosome?  tRNA