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Intro to Mendelian Genetics Honors Biology https://conradchrabol.wordpress.com/mendels-early-works/

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Presentation on theme: "Intro to Mendelian Genetics Honors Biology https://conradchrabol.wordpress.com/mendels-early-works/"— Presentation transcript:

1 Intro to Mendelian Genetics Honors Biology https://conradchrabol.wordpress.com/mendels-early-works/

2 What is Genetics? The science that studies ___________. Heredity is passing of characteristics from parent to offspring. https://www.the-joke-box.com/picture/192/genetics.html Heredity

3 The Father of Genetics: ____________ was an Austrian monk that was born in 1822. In the monastery, he studied genetic ______ and gave us a basic understanding of _______ and how they work. Gregor Mendel traits genes

4 Mendel’s experiments were designed by using ____________ in the monastery garden Pea plants have both ___________ and __________ parts https://www.lexile.com/book/details/9780810954755/ pea plants male female

5 Pea plant transfer _______ (sperm) to the egg located in the _______ plant, resulting in ________ parent. Self-Pollination This is called ______________ pollen same one

6 ____________ is the process of _________ the pollen (sperm) and egg. Fertilization uniting

7 Mendel’s Pea Experiments: Mendel started his experiments with peas that were _________________ = if allowed to _________________ they would produce ____________________ to themselves. true-breeding self pollinate offspring identical

8 Mendel’s Pea Experiment Mendel ____________________ making parts and ____________ from _______ plant. This allowed him to _____________ plants with ______________ characteristics and ________ the results http://hus.yksd.com/distanceedcourses/YKSDbiology/lessons/FourthQuarter/Ch apter11/11-1/images/MendelExperiment.gif removed pollen cross-breed added pollen another different study

9 A _____________________ is called a ____________ Mendel tested _________________ in peas. Pearson Education Inc,; Publishing as Pearson Prentice Hall specific characteristic trait 7 different traits

10 When Mendel crossed true- breeding (________) PLANTS with 2 ______________ traits: (EX: Tall crossed with short) PURE Contrasting

11 Mendel’s Pea Experiment ____ generation (_________) ____ generation (______= offspring) ___ generation P1 Parental F1 Filial F2

12 He always found the same pattern: 1.ONLY ______ trait ____________ in the ____generation BUT... 2. ___________ traits were found in ____ generation. The ________ trait __________ in a _________ ratio. one showed F1 Both F2 missing returned 3:1

13 http://www.tubechop.com/watch/7029990 It’s all about the patterns! Image modified from: http://www.laskerfoundation.org/rprimers/gnn/timeline/1866.html http://www.biology.lifeeasy.org/2502/explain-the-law-of- dominance-using-a-monohybrid-cross

14 Mendel decided that there must be a pair of ___________ that ________each trait and that __________ must be able to _______ the other. factors control one factor hide

15 The factors Mendel referred to are now known as _______ that are carried on the _____________ _____________. http://www.biologyjunction.com/karyotype_lab.htm genes homologous chromosome

16 A gene is a stretch of DNA or RNA that determines a certain trait. Genes can have two or more different CHOICES. An _______ is one of the choices for the gene. allele Example: Eye color

17 __________________ = An allele that ________ the presence of another allele __________________ = An allele that __________________ the presence of another allele Dominant hides Recessive is hidden by http://io9.com/yet-another-lesson-that-should- be-banished-from-biology-1204061434

18 Dominant is represented by a ____________. Recessive is represented by a ____________. CAPITAL LETTER lowercase letter http://gladewaterbiology.blogspot.com/2009/11/law-of-dominance.html

19 How does the recessive trait skip a generation? P1 F1 F2 Meiosis The movement of ____________ in _________. Chromosomes

20 Remember Meiosis? _____________ chromosomes _________ during ANAPHASE I = _________________ homologous separate SEGREGATION Image modified from: http://www.emc.maricopa.edu/faculty/farabee/BIOBK/Crossover.gif

21 ____ offspring __________ an allele for tallness from their _______ parent and an allele for shortness from their ________ parent. The F 1 plants ALL ___________ but are ___________ an allele for _____________ F1 received tall short http://gladewaterbiology.blogspot.com/2009/11/law-of-dominance.html LOOK TALL carrying short

22 What’s happening in F 1 CROSS? LAW OF ___________________ alleles are separated when the F 1 plants ______________ When these gametes recombined to make the F 2 generation, the _____________ trait _______________ in ¼ of the offspring http://biology-forums.com/index.php?action=gallery;sa=view;id=514 SEGREGATION made gametes short reappears


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