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CRCT PRACTICE, 3/17/14 Organisms that carry two identical Genes for a trait are called a. b. c. d. Co-dominant Homozygous Heterozygous Hybrid Mendel’s P1 Punnett Square: Trait= height Parent cross= TT x tt Offspring: Offspring: Offspring: Offspring: CRCT PRACTICE, 3/18/14 Mendel observed several traits that have two different forms, for example, the height of pea plants is controlled by two different A. B. C. D. organs hybrids alleles mutations Write the question and answer completely: 1.What are two ways sexual and asexual reproduction are alike? 2. What is the MAJOR difference between asexual and sexaul reproduction? 3. Specifically where are genes found ? 4. What is the difference between an allele and a gene? TURN THIS IN. PICK UP PUNNETT SQ CRCT PRACTICE 3/19/14 Which of the following is true about multicellular organisms? A.Their cells have specific functions. B.Their cells have general functions. C.Their cells perform more than one function. D. Their cells cannot perform any functions. Guinea Pigs Brown fur – dominant-B Grey fur- recessive- b List all the allele combinations for brown fur __________________ List all the allele combinations for grey fur ___________________ Work a Punnett square showing the parent cross between a homozygous grey parent and a heterozygous brown parent. CRCT Practice March 20, 2014 If one copy of a dominant allele is present in a genotype, then the trait the allele codes for is A. Expressed in the phenotype B. Not expressed in the phenotype C. Partially expressed in the phenotype D. Not expressed in all sibling’s phenotype After the quiz, read two sections from the new book: 1. Pages 150-154 2. Pages 144-148 CRCT Practice 3/21/14 Which is an example of an acquired trait? A. B. C. D. Eye color Hair color Blood type Ability to read Vocabulary 15. Selective Breeding- the process of choosing a few organisms with desired traits to reproduce; can produce offspring with those traits 16. Natural Selection-the process of nature choosing the organisms with the strongest traits to survive; drives evolution 17. Adaptation- a trait an organism has that enables that organism to survive and reproduce 18. Genetic engineering-man driven; creating organisms with a specific trait; done in a laboratory setting Notes, 3/21/14 1. What is natural selection? 2. What is speciation? 3. What is isolation? 4. What role does genetics play in natural selection and evolution?