Biology 1404 exam review - Study guides, Class notes & Summaries

If xenon has an atomic number of 54 and a mass number of 108, how many neutrons does it have? - -54 -Atoms that vary in the number of neutrons found in their nuclei are called - -isotopes -Potassium has an atomic number of 19. What is its electron configuration - -shells 1, 2 and 3 are full and shell 4 has one electron -Which type of bond represents a weak chemical bond - -hydrogen bond -Which of the following statements is not true - -Water is the most abundant molecule in the Earth...

the white allele is recessive - -white flowering plants were not observed in the F1 generation following a cross of true breeding purple and white flowering plants in Mendels monohybrid cross experiment because -dipliod - -human somatic cells are -16 - -given 4 different charateristics assuming independent assortment how many different types of gamestes are possible -on the same chromosome - -if two genes are linked they are -dividing white blood cells - -which cell would be best to ...

Allele - -gene variations that arise by mutation and exist at the same relative locations on homologous chromosomes -Autosomes - -Any of the non-sex chromosomes -Blending Theory of Inheritance - -hypothetical inheritance pattern in which parental traits are blended together in the offspring to produce an intermediate physical appearance -Codominance - -in a heterozygote, complete and simultaneous expression of both alleles for the same characteristic -continuous variation - -inherita...

Gene expression - -The process by which DNA directs protein synthesis and has two stages - transcription - translation -Transcription - -the synthesis of RNA using information in DNA - produces messenger RNA (mRNA) -Translation - -the synthesis of a polypeptide using information in the mRNA -Ribsosomes - -the sites of translation -Translation in prokaryotes - -translation of mRNA can begin before transcription has finished (coupled) -Transcription in eukaryotes - -transcripti...

Define Evolution - -the process by which modern organisms have descended from ancient ones -What is a theory - -a well tested explanation of a natural phenomena -How are theories developed? - -theories are developed by frequent testings of hypotheses -Who established the Theory of Evolution by Natural Selection? - -Charles Darwin -What was the name of the book he published? - -The Origin of Species -What island is famous for its relationship to the theory? - -the Galapagos Islands...

One possible results of chromosomal breakage is for a fragment to join a non-homologous chromosome. What is this alteration called? - -A translocation -Which of the following is true of linkage? - -The closer two genes are on a chromosome, the lower the probability that a crossover will occur between them -The chromosomal theory of inheritance explains what? - -Mendel's laws of segregation and independent assortment -If a deletion occurs on the Y chromosome that removes the SRY gene in...

One possible results of chromosomal breakage is for a fragment to join a non-homologous chromosome. What is this alteration called? - -A translocation -Which of the following is true of linkage? - -The closer two genes are on a chromosome, the lower the probability that a crossover will occur between them -The chromosomal theory of inheritance explains what? - -Mendel's laws of segregation and independent assortment -If a deletion occurs on the Y chromosome that removes the SRY gene in...

what is a basic method of extration of DNA? - -1. cells are lysed using a detergent that disrupts plasma membrane 2. cells are treated with protease to destroy protein and RNAase to destroy RNA 3. cells are put in a centrifuge and the supernantant liquid is transferred to a clean tube 4. the DNA is precipitated with ethanol, it forms viscous strands -what is restriction endonucleases? what are they key to?what are Palindromes? - -a defense system for bacteria, it recognizes and cleave a sp...

1.Darwin referred to the process of promoting certain traits by breeding members with those traits as ____. The breeding of plants and animals to produce desirable traits. Organisms with the desired traits, such as size or taste, are artificially mated or cross-pollinated with organisms with similar desired traits. - -artificial selection -2.A morphological adaptation in which one species resembles another is called ____. - -Mimicry -3.Population decline causes an extreme genetic dr...

-Homologus Isolation Fossils - -preserved remains of ancient organisms -Georgraphic Isolation - -Population of speices becomes seporated by a physical boreder (mountains, rivers, land, etc.) - -structures that have diffrent mature forms but develop from same embryonic tissue -Temporal - -Isolated by time (open flower in winter, open flower in spring) -James Hutton - -Geologist who said that the forces that shaped the Earth took place over long periods of time, so the Earth had to be ...