Mendel and Genetics Gregor Mendel Called the Father
- Slides: 15
Mendel and Genetics
Gregor Mendel • Called the “Father of Genetics” because he was the first to study genetics • Researched how traits are inherited in pea plants
Mendel’s Experiments:
Mendel’s Experiments:
Mendel discovered that: 1. Parents transmit info about traits to offspring (he called them “factors”, but we know that they are genes) 2. Each individual has 2 factors for each trait; 1 from each parent - this may result in homozygous (WW or ww) or heterozygous (Ww) combinations
3. The alternate forms of a factor are alleles 4. The presence of an allele doesn’t mean that the trait is expressed (seen) - the dominant allele is seen the recessive allele is only seen if an individual has 2 recessive alleles
For example, in pea plants: • W = purple flower – purple is dominant, therefore a capital letter • w = white flower – white is recessive, therefore a lower case letter WW = purple flower ww = white flower Ww = ?
Predicting offspring • Punnett squares help to predict what alleles offspring might inherit
Step 2 of Mendel’s Experiment:
Step 3 of Mendel’s Experiment:
Analyzing Results: • Probablility– the likelihood that something will happen – Example: the probability of a coin landing with heads or tails is 50% • Ratio – describes the probability of each phenotype or genotype – The ratio of heads: tails is 50: 50, or 1: 1
Ratio of tall to short (PHENOTYPE) ___: ___ Ratio of TT: Tt: tt (GENOTYPE) ___: ___
% of brown rabbits ___ % of black rabbits ___ % of homozygous dominant (BB)___ % of heterozygous (Bb)___ % of homozygous recessive (bb) ___ Ratios can also be fractions, like these What are the possible phenotypes of the rabbits? _____ What are the possible genotypes of the rabbits? ____
How to set up a Punnett Square • If you cross a heterozygous tall pea plant with a homozygous short pea plant what will the genotypic and phenotypic ratio be? • Identify the letter to use to represent the trait. • List the possible combinations • Place the letter on the outside of the punnett square. • Solve.
- Gregor mendel father of genetics
- Gregor mendel’s principles of genetics apply to
- How did gregor mendel contribute to genetics
- Who is gregor mendel and what is he famous for
- Who is gregor mendel and what did he do?
- Gregor mendels principles of genetics apply to
- Section 11-1 the work of gregor mendel
- Austrian genetic traits
- Rryy x rryy
- Gregor mendel chart
- Chapter 12 lesson 1 the work of gregor mendel
- Who is gregor mendel
- What did gregor mendel research
- Who is gregor mendel
- How many pairs of chromosomes
- Conclusion gregor mendel