Welle

What was the most significant conclusion that Gregor Mendel drew from his experiments with pea plants? A) in that location is considerable brokertic variation in garden peas. B) Traits ar patrimonial in discrete units, and are not the results of blending. C) Recessive factors occur more frequently in the Fl generation than do everywhereriding ones. D) Genes are cool of DNA. E) An organism that is homozygous for many another(prenominal) recessive characteristics is at a disadvantage. 2) How many unique gametes could be produced through independent multifariousness by an psyche with the genotype AaBbCCDdEE? rite down the gametes ) Why did Mendel continue some of his experiments to the F2 or F3 generation? A) to obtain a larger number of offspring on which to base statistics 8) to observe whether or not a recessive peculiarity would appear C) to observe whether or not the dominant trait would reappear D) to distinguish which alleles were segregating E) to be able to desc ribe the frequency of recombination 4)Two plants are crossed, resulting in offspring with a 31 ratio for a special(prenominal) trait.What does this suggest? 5) The fact that all seven of the pea plant traits study by Mendel obeyed the rinciple of Independent assortment. What does this suggest about the seven traits studied by Mendel? 6) In the cross AaBbCc x AaBbCc, what Is the luck of producing the genotype AABBCC 7) Given the sustains AABBCc x AabbCc, assume simple dominance for each trait and Independent assortment. What affinity of the progeny will be expected to phenotypically resemble the first parent? ) Which of the adjacent is the best statement of the use of the addition rule of probability? A) the probability that both or more independent events will some(prenominal) occur B) the probability that 2 or more ndependent events will some(prenominal) occur in the offspring of one set of parents C) the probability that all one of two Independent events will occur D) th e probability of producing two or more heterozygous offspring E) the likelihood that a trait is due to two or more meiotic events 9) Radish flowers may be red, purple, or white.A cross surrounded by a red-flowered plant and a white-flowered plant yields all-purple offspring. The part of the radish we eat may be egg-shaped or long, with long being the dominant characteristic. *** If true-breeding red long radishes are crossed with true-breeding white oval radishes, what will the Fl phenotype? flower color trait in radishes Is an example of which of the B) sex linkage C) codominance D) incomplete dominance E) hypostasis 10) Gene S controls the sharpness of spines in a type of cactus.Cactuses with the dominant allele, S, occupy sharp spines, whereas homozygous recessive ss cactuses have dull spines. At the same time, a second gene, N, determines whether or not cactuses have spines. homozygous recessive nn cactuses have no spines at all. *** The relationship between genes S and N i s an example of A) incomplete dominance. B) epistasis. C) complete dominance. D) pleiotropy. E) codominance. 1) Women (and all female mammals) have one active X chromosome per cell instead of two. What causes this?A) modification of the XIST gene so that it is active save on one X chromosome, which because becomes inactive B) activation of the Barr gene on one of the two X chromosomes that then inactivates C) crossover between the XIST gene on one X chromosome and a related gene on an autosome D) inactivation of the XIST gene on the X chromosome derived from the male parent E) the removal of methyl (CH3) groups from the X chromosome that will remain active 12) Which of the following statements is true of linkage? A) The next two genes are on a chromosome, the lower the probability that a crossover will occur between them.B) The observed frequency of recombination of two genes that are far apart from each other has a maximal value of 100%. C) All of the traits that Mendel studied -seed color, pod shape, flower color, and others-are due to genes link on the same chromosome. D) Linked genes are found on varied chromosomes. E) Crossing over occurs during prophase II of meiosis. 13) What does a frequency of recombination of 50% fate? A) The two genes are likely to be located on varied chromosomes. B) All of the offspring have combinations of traits that match one of the two parents.C) The genes are located on sex chromosomes. D) Abnormal meiosis has occurred. E) Independent assortment is hindered. 14) Map units on a linkage map cannot be relied upon to play physical distances on a chromosome for which of the following reasons? A) The frequency of crossing over varies along the length of the chromosome. B) The relationship between recombination frequency and map units is diametrical in every individual. C) Physical order on the chromosomes is slightly different in every individual. E) Linkage map istances are identical between males and females. 5) Which o f the following is known as a Philadelphia chromosome? A) a human chromosome 22 that has had a specific translocation B) a human chromosome 9 that is found however in one type of cancer C) an animal chromosome found chiefly in the mid-Atlantic area of the United States D) an imprinted chromosome that always comes from the mother E) a chromosome found not in the nucleus but in mitochondria 16) The following is a map of four genes on a chromosome. Figure 1 Between which two genes would you expect the highest frequency of recombination? A) A and WB) w and E C) E and G D) A and E E) A and G 17) How do we describe transformation in bacteria? A) the creation of a base of DNA from an ribonucleic acid molecule B) the creation of a strand of RNA from a DNA molecule C) the infection of cells by a phage DNA molecule D) the type of semiconservative replication shown by DNA E) soaking up of external DNA into a cell 18) Cytosine makes up 42% of the nucleotides in a sample of DNA from an organ ism. Approximately what percentage of the nucleotides in this sample will be thymine? 19) What is meant by the description antiparallel regarding the strands that make p DNA?A) The twisting nature of DNA creates in series(p) strands. B) The 5 to 3 direction of one strand runs counter to the 5 to 3 direction of the other strand. C) Base pairings create unequal position between the two DNA strands. D) One strand is positively charged and the other is negatively charged. E) One strand contains only purines and the other contains only pyrimidines. 20)An Okazaki fragment has which of the following arrangements? A) primase, polymerase, ligase B) 3 RNA nucleotides, DNA nucleotides 5 C) 5 RNA nucleotides, DNA nucleotides 3 D) DNA polymerase l, DNA polymerase.