OBJ: Given notes, video, activity sheet SWBAT describe some patterns of human inheritance including multiple alleles, many gene traits, and sex-linked.

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Presentation transcript:

OBJ: Given notes, video, activity sheet SWBAT describe some patterns of human inheritance including multiple alleles, many gene traits, and sex-linked genes with 70% accuracy. BRING IN TEXT BOOK DN: Hand-in SVQ4 quiz scantron; HW Check- DNA Connection Booklet ACT: Introduction to multiple alleles, many gene trait, sex chromosomes, sex-linked genes, colorblindness Read, Text p. 111-116; Work on Human Inheritance Booklet HW: Complete Human Inheritance Booklet; UPCO10 Quiz (Ch.6; Mitosis, Meiosis, Sexual, Asexual Repro) next week; Work on Genetics Review Sheets; Genetics Exam, Monday April 28

Two allele system (Mendel) T = tallness; t = shortness Three allele system (multiple allele) IA = A blood IB = B blood i = O blood (recessive) T T T t IB i IB IA IA IA t t i IB IB i IA i

Human Inheritance Notes Multiple Alleles Ex: Human Blood Types Alleles: IA, IB, i Human Blood Type Allele Combination A IAIA or IAi B IBIB or IBi AB (universal receiver) IAIB O (universal donor) ii

Trait One Gene Trait (Mendel) finger length gene 50% Dad 50% Mom 1 allele gene 1 allele

Trait Many Gene Trait Ex: Human Height = 4 genes Human skin color, human eye color 50% Dad 50% Mom Trait Human Height 4 allele many genes 4 allele

Body Cell contains 46 chromosomes or 23 pairs of chromosomes Sex chromosome = 23rd chromosome pair Sex chromosome determines: 1] male/female 2] normal vs. red-green colorblind vision 3] other traits (sex-linked)

Father X Y X XX XY Mother Human Sex Chromosome (chromosome pair 23) daughter son daughter son

Sex-Linked Genes: genes carried on sex chromosomes; example red-green colorblindness Y XCXC XCY Xc XCXc XcY Female: XX Male: XY C = normal vision c = colorblindness father daughter normal son normal mother (carrier) Son colorblind daughter carrier Carrier: a person who does not show the observable trait but is carrying the hidden recessive allele on the sex chromosome.