Question 5 of 10 Match each definition to the appropriate term. Locus Interference Linkage Recombination Answer Bank the observed double crossover frequency differs from the expected double crossover frequency the tendency for genes located in close proximity on the same chromosome to be inherited together the process by which a new pattern of alleles on a chromosome is generated the chromosomal site where a specific gene is located

Question 5 of 10 Match each definition to the appropriate term. Locus Interference Linkage Recombination Answer Bank the observed double crossover frequency differs from the expected double crossover frequency the tendency for genes located in close proximity on the same chromosome to be inherited together the process by which a new pattern of alleles on a chromosome is generated the chromosomal site where a specific gene is located

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter6: Cytogenetics: Karyotypes And Chromosome Aberrations

Section: Chapter Questions

Problem 3QP: A colleague e-mails you saying that she has identified an interesting chromosome variation at 21q13....

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My Question is what is the probability their first child will have hemophilia and drawn pedigrees for family members with genotypes. My explantion so far: A man has both X and Y chromosomes as sex chromosomes in his body. Here, though the brother of the man is hemophiliac, a man can’t be a carrier of hemophilia. So, it can be said that his chromosome is “XnY”.Here, the “n” stands for “normal”.Though the paternal uncle is hemophiliac, a man cannot be a carrier of hemophilia, his niece will not be a career. So it can be said that the woman is also not a carrier and has the “XnX” chromosome.So, as the mother is not a carrier, their first child does not have a chance of having hemophilia. This can be determined as it is known that there is no hidden carrier of hemophilia in the family.
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A couple planning their family are aware that through the past threegenerations on the husband's side a substantial number of stillbirthshave occurred and several malformed babies were born who diedearly in childhood. The wife has studies genetics and urges herhusband to visit a genetic counseling clinic, where a completekaryotype-banding analysis is performed. Although the tests showthat he has a normal complement of 46 chromosomes, bandinganalysis reveals that one member of the chromosome 1 pair (ingroup A) contains an inversion covering 70 percent of its length.The homolog of chromosome 1 and all other chromosomes showthe normal banding sequence.(a) How would you explain the high incidence of past stillbirths?predictabouttheprobabilityof(b) What can you abnormality/normality of their future children?(c) Would you advise the woman that she will have to bring each pregnancy to term to determine whether the fetus is normal? Ifnot, what else can you suggest?
Find the gr and pr and answer in using the punnett square
DRAW IT Suppose, as in the questionat the bottom of Figure 15.9, the parental(P generation) flies were true-breedingfor gray body with vestigial wings andblack body with normal wings. Draw thechromosomes in each of the four possiblekinds of eggs from an F1 female, andlabel each chromosome as “parental”or “recombinant.”
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A couple planning their family are aware that through the pastthree generations on the husband’s side a substantial numberof stillbirths have occurred and several malformed babies wereborn who died early in childhood. The wife has studied geneticsand urges her husband to visit a genetic counseling clinic,where a complete karyotype-banding analysis is performed.Although the tests show that he has a normal complement of46 chromosomes, banding analysis reveals that one memberof the chromosome 1 pair (in group A) contains an inversioncovering 70 percent of its length. The homolog of chromosome1 and all other chromosomes show the normal bandingsequence. Question: What can you predict about the probability of abnormality/normality of their future children?
A couple planning their family are aware that through the pastthree generations on the husband’s side a substantial numberof stillbirths have occurred and several malformed babies wereborn who died early in childhood. The wife has studied geneticsand urges her husband to visit a genetic counseling clinic,where a complete karyotype-banding analysis is performed.Although the tests show that he has a normal complement of46 chromosomes, banding analysis reveals that one memberof the chromosome 1 pair (in group A) contains an inversioncovering 70 percent of its length. The homolog of chromosome1 and all other chromosomes show the normal bandingsequence. Question: How would you explain the high incidence of paststillbirths?
The frequency of single crossover recombinant gametes (those with chromosomes having crossed over) occurring is half the frequency of the actual crossing over event. What would best explain this? O Each crossover takes place between only non-sister chromatids of a homologous chromosome pair O Crossovers occur in about 50% of meiosis events O This doesn't actually occur because all genes are on separate chromosomes O A test cross between a homozygous and heterozygote produces % heterozygotes and % homozygotes progeny O Shugoshin is inappropriately expressed in meiosis II causing nondisjunction to occur
In Neurospora, his2 mutants require the amino acidhistidine for growth, and lys4 mutants require theamino acid lysine. The two genes are on the samearm of the same chromosome, in the ordercentromere - his2 - lys4.A his2 mutant is mated with a lys4 mutant. Draw all ofthe possible ordered asci that could result from meioses in which the following events occurred, accountingfor the nutritional requirements for each ascospore.Ascospores without any copy of a chromosome willabort and die, turning white in the process.a. A single crossover between the centromere and his2b. A single crossover between his2 and lys4c. Nondisjunction during the first meiotic divisiond. Nondisjunction during the second meiotic divisione. A single crossover between the centromere andhis2, followed by nondisjunction during the firstmeiotic divisionf. A single crossover between his2 and lys4,followed by nondisjunction during the firstmeiotic division
In an electrophoretic gel across which is applied a powerful electrical alternating pulsed field, the DNA of thehaploid fungus Neurospora crassa (n = 7) moves slowlybut eventually forms seven bands, which represent DNAfractions that are of different sizes and hence havemoved at different speeds. These bands are presumed tobe the seven chromosomes. How would you show whichband corresponds to which chromosome?