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Unit 4 – Reproduction and Genetics Lesson 11 - Mendel and Genetics. Colorado Agriscience Curriculum . I. Gregor Mendel. A) Geneticist who first developed the rules to predicting the pattern of heredity 1) Monk who did experiments with peas B) Heredity
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Unit 4 – Reproduction and Genetics Lesson 11 - Mendel and Genetics Colorado Agriscience Curriculum
I. Gregor Mendel • A) Geneticist who first developed the rules to predicting the pattern of heredity • 1) Monk who did experiments with peas • B) Heredity • 1. passing of traits such as coat color, polled or horned, height, etc. from parents to offspring Unit 4, Lesson 11 Mendal and Genetics PP
I. Gregor Mendel • C) Breeding Generations • 1. P Generation • a) parental generation • 2. F1 Generation • a) Filial Generation • b) 1st offspring of P Generation • 3. F2 Generation • a) 2nd Filial Generation • b) offspring of F1 Generation Unit 4, Lesson 11 Mendal and Genetics PP
I. Gregor Mendel • D)3 Steps of Mendel’s Experiment • 1. P Generation • a) Allowed each variety to self pollinate for several generations • 1. ensure that all offspring would display only one form of a particular trait (flower color) • 2. Crossbred the two strains of the P generation • - Recorded Data • - Resulted in all purple flowers Unit 4, Lesson 11 Mendal and Genetics PP
I. Gregor Mendel • D)3 Steps of Mendel’s Experiment • 3. Allowed the F1 Generation to self-pollinate • a) Resulted in the F2 Generation • b) 1 out of every four flowers was white. Unit 4, Lesson 11 Mendal and Genetics PP
I. Gregor Mendel Unit 4, Lesson 11 Mendal and Genetics PP
II. Traits • A) Chromosomes and Genes are in pairs • 1. One chromosome is contributed by each parent • 2. Chromosome Locus • a) site where a gene is found on a chromosome • B) Traits • 1. For each inherited trait an individual has, there are two copies of that gene ( 1 from each parent) • 2. Genes are what causes traits to appear • a) each version is called an allele • a) eye color, coat color, marbling, ribeye area, etc. Unit 4, Lesson 11 Mendal and Genetics PP
III. Genes Located on Corresponding Homologous Chromosomes may: • A) Correspond to each other • 1. homozygous • B) Differ from each other • 2. heterozygous • C) Genes on corresponding chromosomes that control the same trait are called alleles Unit 4, Lesson 11 Mendal and Genetics PP
IV: Alleles • A) Homozygous (BB or bb) • 1. both alleles are the same • B) Heterozygous (Bb) • 1. two alleles are different • C) The dominant (capital) allele is always expressed when it is present • D) The recessive allele is only expressed when both copies of the gene are recessive Unit 4, Lesson 11 Mendal and Genetics PP
V: Genotype and Phenotype • A) Genotype • 1. amount, order, and type of genes an individual has • 2. genetic make-up of an individual • B) Phenotype • 1. Physical traits an individual possesses • 2. Doesn’t take into account masked traits only expressed or dominant traits Unit 4, Lesson 11 Mendal and Genetics PP