Bio 191 exam Study guides, Class notes & Summaries

define one genetic map unit ~ the physical distance between two genes that results in a 1% frequency of recombination In birds, sex is determined by ZW chromosome inheritance. Males are ZZ and females are ZW. Within pigeon populations there is a recessive, Z-linked allele that is lethal in embryos. What is the expected sex ratio in the offspring of a cross between a male that is heterozygous for the lethal allele and a wildtype female? ~ 2:1 male to female A recessive allele on the X c...

which of the following statements is/are correct? a. Ribosomes are made up by many different proteins. b. An individual ribosome can make only one type of protein. c. All mRNAs fold into particular 3D structures that are required for their translation. d.The large and small subunits of an individual ribosome are found associated together sometimes with mRNA and sometimes without mRNA. e. A single mRNA molecule may be associated with multiple ribosomes at the same time. ~ e. A single mR...

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Evolution - ANSWER: -descent with modification -all organisms are related through descent from an ancestor that lived in the remote past. Fossils - ANSWER: -remains or traces of organisms from the past -usually found in sedimentary rock Strata - ANSWER: -layers of sedimentary rock Ancestral - ANSWER: -species are found in lower layers -don't use primitive Derived - ANSWER: -species are found in upper layers -don't use new Galapagos Islands - ANSWER: -chain of islands ...

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