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Science Bio
Meghan Methe B-block 11.14.12
Chapter 8 Heredity and Genetic Variation (Objectives) pg. 192-221
Questions:
1. The role of genes in heredity is to carry the traits for the making of DNA. 2. The law of probability says that each chance of probability is equal in the sense of the possible outcomes of the traits present. 4. Dominant masks the recessive which in situations where both trait alleles are present in a gene the organism would be heterozygous and the dominant allele will be what phenotype trait will be shown on the organism. 5. 6. The homozygous name for an organism is to describe when the alleles are both the same meaning not a carrier while heterozygous is where the carrier is when the alleles are different. 7. The genotype of an organism is the factual formula while the phenotype is the physical trait; the visible trait not just represented by letters. 8. The gene symbols for homozygous would be for example a blue fish could be represented by BB for dominant or bb if blue trait is recessive. 9. Mendel’s observations of genetics relates to chromosome theory of heredity because they both deal with the genetic material coming from the mother and father of the organism. 10. Beadle and Tatum’s work opened up a whole new way of looking at genes and what they do as well as their functions and structural formation. Also their work helped to observe crossing between two sexes forming variability of offspring for genetic combinations and trait outcome. 11. The biochemical nature of a gene mutation is to add traits into a gene to create specific trait for the organism for the phenotype when it is birthed. 12. A mutant differs from other characteristics of a given individual because they change the pattern of DNA which also changes how the organism was supposed to look to how it does do to a skip of DNA pattern. 13. Genetic information transmitted by DNA is determined by converting it to RNA

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