Download Mendelian Genetics Guided Notes Children resemble their parents

Mendelian Genetics Guided Notes Children resemble their parents Concept What are some of the useful traits that humans have accentuated by controlled mating? What is a gene? Animation Why did Mendel work with peas? What is cross fertilization? Knowledge check: Gregor Mendel used pea plants to study inheritance. If you wanted to do the same thing what would you need to do? a. Set aside enough room to grow pea plants. b. Know how to grow pea plants c. Keep notes on the plant generations. d. Get the materials necessary for growing pea plants e. All of the above Mendel grew his pea plants in a small garden. He controlled the growing conditions as much as possible. Why is this important? Genes come in pairs Concept What did Mendel conclude from his experiments? Animation What is a phenotype? What are the seven traits of pea plants that Mendel worked with? How many phenotypes does each trait have? ____________ What is an allele? What is a genotype? What is a purebred? Knowledge check: You want to repeat Mendel’s experiments with an eighth trait. You choose flower color. pea plants have flowerrs that are white or colored.To get a pure­bred colored flower you start with a colored flower plant. What should you do next? a. Nothing, this is a purebred colored flower plant b. Self­fertilize this plant. If all the flowers of the next generation are colored, the plant is purebred. c. Cross­fertilize this plant with a colored flower plant. d. Cross­fertilize this plant with a white flower plant. If in the second generation you still got some white flowers, what should you do next to get a colored pure­bred plant? a. Nothing, there is no way to get a purebred from this experiment. b. Choose several of the colored flower plants, self­fertilize them, then plant and grow the seeds. c. Choose several of the white flower plants, self­fertilize them , then plant the seeds. If you get colored offspring you know that they are purebred. How many times do you need to keep self­fertilizing the colored plants to get a purebred colored plant? a. Once more. b. Twice more. c. Indefinitely, until you get all colored offspring. d. Indefinitely, until you get all white offspring. Genes don’t blend Concept In Mendel’s experiment, did the pea plants produce offspring with blended traits? ______ Animation If a “puffed” pod purebred pea is crossed with a “pinched” pod purebred pea, will the offspring be “semi­puffed”? ____________ Knowledge check If a pure­bred tall plant is crossed with a pure­bred short plant, the offspring will be: a. Either tall or short b. All offspring will be medium sized. c. Some offspring will be tall, some will be short and some will be medium sized. Some genes are dominant Concept What is a dominant trait? What is a recessive trait? Animation What does the term homozygous mean? What does the term heterozygous mean? What happens to the recessive allele in a heterozygous offspring? If the yellow allele is dominant (Y) and the green allele is recessive (y), what are the possible genotypes a yellow the offspring? If the yellow allele is dominant (Y) and the green allele is recessive (y), what are the possible genotypes of a green offspring?