1. Many plant populations such as strawberries and lettuce are artificially selected for certain genes by farmersand therefore may undergo periods of sterility due to the manipulation into a nonfertile hybrid. However, aftermany generations of self fertilization reproduction or cloning, the population is able to breed with a differenthybrid species that was artificially manipulated as well. This leads to a new population of species with 2n cellsof new chromosomal numeric integrity known asa. Allopolyploid. b. Autopolyploid.c.Hybridsexualoid. d.sympatriploid

The hybrid formation is routinely used in plant breeding that follows the laws of mutation. Usually…

Answered: 1. Many plant populations such as…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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2. The following chart shows the crossover frequencies for some genes on an autosome of organism Y. Construct a chromosome map. Which two genes are most likely going to be inherited together? Genes Crossover Frequency W & S 8% C & W C & B C & S 3% 5.5% 11% B & S 5.5%
6. A diploid strain of yeast was made by mating a haploidstrain with a genotype w−, x−, y−, and z− with a haploidstrain of opposite mating type that is wild type for thesefour genes. The diploid strain was phenotypically wildtype. Four different X-ray-induced diploid mutantswith the following phenotypes were produced fromthis diploid yeast strain. Assume a single new mutation is present in each strain.Strain 1 w− x+ y− z+Strain 2 w+ x− y− z−Strain 3 w− x+ y− z−Strain 4 w− x+ y+ z+When these mutant diploid strains of yeast go throughmeiosis, each ascus is found to contain only two viablehaploid spores.a. What kind of mutations were induced by X-rays tomake the listed diploid strains?b. Why did two spores in each ascus die?
6. A research group has selected three independent Trp−haploid strains of Neurospora, each of which cannotgrow in the absence of the amino acid tryptophan.They first mated these three strains with a wild-typestrain of opposite mating type, and then they analyzedthe resultant octads. For all three matings, two of thefour spore pairs in every octad could grow on minimalmedium (that is, in the absence of tryptophan), whilethe other two spore pairs were unable to grow on thisminimal medium.a. What can you conclude from this result?In the matings of mutant strains 1 and 2 with wild type,one of the two topmost pairs in some octads had sporesthat could grow on minimal medium while the other ofthe two topmost pairs in the same octads had spores thatcould not grow on minimal medium. In the mating ofmutant strain 3 with wild type, either all the spores inthe two topmost pairs could grow on minimal mediumor all could not grow on minimal medium.b. What can you conclude from this result?The…
Which of the following statements regarding gene duplication are FALSE? Select ALL that apply.
Three linked genes (v, p and b) are studied to begin a genetic map. Crosses were carried out and 10,000 progeny were analyzed for each cross. Of 10,000 progeny, there were: 2207 recombinants between v and p 1489 recombinants between p and b 718 recombinants between b and v Use this information to determine the order of these genes on the chromosome (i.e. construct a genetic map)
Which of the following statements regarding gene duplication are FALSE? Select ALL that apply. extra gene copies are highly deleterious duplications arise through unequal crossing over duplicates in the same gene family are called paralogs duplication is an important source of new genes duplications confound the pairing of homologous chromosomes, leading to fertility problems
3b. An additional gene, called W, is found that affects the synthesis of enzymes 1 and 2. Mutant d has a recessive mutation in gene W. genotype enzyme activity without fictamine 1 with fictamine 2 strain W X Y Z 2 1 wild-type + + + ++ ++ mutant a + + + mutant b mutant c + ++ mutant d + + + ++ Once again, justify each answer in one sentence. i) Is gene W most likely a positive or a negative regulator? ii) Is the activity of W activated or inactivated by the presence of fictamine? + ! ++ 1 ¦ : : #111 ; ¦ ++ : ++ ++
7. The following diagram shows 2 pairs of autosomal chromosomes in a karyotype of a biological woman. Based on the karyotype, a genetic counsellor determined that there is evidence that a translocation occurred between two non-homologous chromosomes. The other 21 pairs of chromosomes are NOT shown in this diagram. Assume no chromosomal aberrations occurred in the other chromosomes. As a student-researcher, the genetic counsellor asks you if you can determine whether the translocation occurred in a somatic cell, germ-line cell, or whether this can even be determined from the figure? Provide an answer and the reasoning for your answer. D
17
please answer with thorough explanation
2. Place this events in the correct order that they occur during homologous recombination: A. Resolvase cuts all four chromatidsB. Strand invasion causes one strand of the uncut chromatid to form a D loop C. Spo11 causes a double-strand break in a nonsister chromatidD. Branch migration lengthens the heteroduplex regionE. Recombinant chromosomes separate from each other
11). This pedigree illustrates a family in which some members have a completely penetrant disease caused by a dominant mutation. This mutation is linked at a distance of 10 map units from a SNP marker with three different alleles (1, 2 and 3). The SNP alleles found in each family member are indicated below each pedigree symbol. It is not yet evident whether the very young individuals labeled A and B will develop the disease. a. What is the probability that individual A will develop the disease? b. What is the probability that individual B will develop the disease? 1,3 2,2 1,2 3,2 O 1,2 3,2 A B

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