Cape parrots are found in forests in South Africa. In a study ofCape parrot genetics, biologists produced the karyotype shownfrom somatic cells of a female Cape parrot.an nk on an nN n12 34 5 67an nn8 91012131415• .16171819202122232425 26 27 28Z W29Female SexChromosomes Based on the karyotype, how many chromosomes are presentin the gametes of a Cape parrot?A29B30C56D58

Name: Cape parrots are found in forests in South Africa. In a study ofCape
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Description: Cape parrots are found in forests in South Africa. In a study ofCape parrot genetics, biologists produced the karyotype shownfrom somatic cells of a female Cape parrot.an nk on an nN n12 34 5 67an nn8 91012131415• .16171819202122232425 26 27 28Z W29

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Cape parrots are found in forests in South Africa. In a study of Cape parrot genetics, biologists produced the karyotype shown from somatic cells of a female Cape parrot.

Biology: The Unity and Diversity of Life (MindTap Course List)

14th Edition

ISBN:9781305073951

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter10: Control Of Gene Expression

Section: Chapter Questions

Problem 3CT: Almost all calico cats (one is pictured in FIGURE 10.7B) are female. Why? B When this calico cat was...

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In an in situ hybridization experiment, a certain clonebound to only the X chromosome in a boy with no diseasesymptoms. However, in a boy with Duchenne musculardystrophy (X-linked recessive disease), it bound to theX chromosome and to an autosome. Explain. Could thisclone be useful in isolating the gene for Duchenne muscular dystrophy?
In a cross between a white-eyed female (ww) and a red-eyed male (w+Y), nearly all the progeny were either red-eyed females (w+w) or white-eyed males (wY). However, about 1 in every 2000 F1 flies had an "exceptional phenotype" and was either a white-eyed female or red-eyed male. How did Bridges explain this unexpected result? A) Crossing over B) Incomplete cytokinesis C) Incorrect synapsis D) Nondisjunction E) Pseudoautosomal region
For each of the terms in the left column, choose thebest matching phrase in the right column.a. reciprocal translocation 1. lacking one or morechromosomes or having oneor more extra chromosomesb. gynandromorph 2. movement of short DNAelementsc. pericentric 3. having more than two completesets of chromosomesd. paracentric 4. exact exchange of parts of twononhomologous chromosomese. euploids 5. excluding the centromeref. polyploidy 6. including the centromereg. transposition 7. having complete sets ofchromosomesh. aneuploids 8. mosaic combination of maleand female tissue
The XG locus on the human X chromosome has twoalleles, XG+ and XG. The XG+ allele causes the presence of the Xg surface antigen on red blood cells,while the recessive XG allele does not allow antigento appear. The XG locus is 10 m.u. from the STSlocus. The STS+ allele produces normal activity ofthe enzyme steroid sulfatase, while the recessive STSallele results in the lack of steroid sulfatase activityand the disease ichthyosis (scaly skin). A man withichthyosis and no Xg antigen has a normal daughterwith Xg antigen. This daughter is expecting a child.a. If the child is a son, what is the probability he willlack Xg antigen and have ichthyosis?b. What is the probability that a son would have boththe antigen and ichthyosis?c. If the child is a son with ichthyosis, what is theprobability he will have Xg antigen?
The chromosome 9/22 translocation associated withCML (chronic myelogenous leukemia) is called thePhiladelphia chromosome after the city in which itscancer association was first discovered in 1960.People with CML do not inherit this translocation—it occurs in somatic cells. Why do you think that thisparticular translocation that fuses the bcr and ablgenes happens independently in the somatic cellsof many different people?
Cat fur coat color genetics is interesting. Orange fur is dominant (''B'') to black fur (''b'') and piebald, which is white spotting, is dominant (''S'') to non-white-spotted (''s''). Both of those genes are located on the X chromosome. In addition, in cats, somatic cells exhibit X-inactivation randomly, which explains why there are tortoiseshell cats (when heterozygous, have orange and black spots) as well as calico cats (orange and black but also with white spots). An orange and white spotted male is mated with a tortoiseshell female. State the genotype of the male and the female.
Cat fur coat color genetics is interesting. Orange fur is dominant (''B'') to black fur (''b'') and piebald, which is white spotting, is dominant (''S'') to non-white-spotted (''s''). Both of those genes are located on the X chromosome. In addition, in cats, somatic cells exhibit X-inactivation randomly, which explains why there are tortoiseshell cats (when heterozygous, have orange and black spots) as well as calico cats (orange and black but also with white spots). An orange and white spotted male is mated with a tortoiseshell female. Draw a dihybrid Punnet square to show the possible offspring:
1. Choose the phrase from the right column that best fitsthe term in the left column.a. cytoplasmicsegregation1. transmission of genes through maternalgamete onlyb. heteroplasmic 2. cell that has mtDNAs or cpDNAs all of onegenotypec. homoplasmic 3. having gametes of similar sized. maternalinheritance4. a cell with a mixture of different mtDNAsgenerates a daughter cell with only one kinde. uniparentalinheritance5. a specific fraction of wild-type organellarDNAs is required for a wild-type phenotypef. isogamous 6. cell with mtDNAs or cpDNAs with differentgenotypesg. threshold effect 7. transmission of genes through either amaternal or a paternal gamete, but not both
In the experiment of Figure shown, Stern followed the inheritancepattern in which females carried two abnormal X chromosomesto correlate genetic recombination with the physical exchange ofchromosome pieces. Is it necessary to use a strain carrying twoabnormal chromosomes, or could he have used a strain in whichfemales carried one normal X chromosome and one abnormal Xchromosome with a deletion at one end and an extra piece of the Ychromosome at the other end?
. Several kinds of sexual mosaicism are well documentedin humans. Suggest how each of the following examplesmay have arisen by nondisjunction at mitosis:a. XX/XO (that is, there are two cell types in the body,XX and XO)b. XX/XXYYc. XO/XXXd. XX/XYe. XO/XX/XXX
Let’s suppose that a species of mosquito has two different types ofsimple transposons that we will call X elements and Z elements.The X elements appear quite stable. In a population of 100 mosquitoes,it is found that every mosquito has 6 X elements, and theyare always located in the same chromosomal locations amongdifferent individuals. In contrast, the Z elements seem to movearound quite a bit. Within the same 100 mosquitoes, the number of Z elements ranges from 2 to 14, and the locations of the Z elementstend to vary considerably among different individuals. Explainhow one simple transposon can be stable and another simple transposoncan be mobile, within the same group of individuals.
Drosophila researchers have collected many strainsthat carry a single recombinant P element containing awild-type white gene (a P[w+] transgene) inserted intoa known genomic location. These strains can be used tomap the location of any mutant gene in the fly genome.Investigators performed a testcross to map arecessive mutation rough (ro), which causes rougheyes, relative to a P[w+] element on chromosome 3.Females heterozygous for the P[w+] on one chromosome 3 and a ro− mutation on the other, homologouschromosome 3 were crossed to ro−/ro− males, and theprogeny in the following list were obtained. In boththe parents and the progeny, the endogenous whitegene is nonfunctional—the flies have red eyes onlyif they contain the P[w+] transgene.145 red, smooth (wild-type) eyes152 white, rough eyes2 white, smooth eyes1 red, rough eyesa. Are ro and the P[w+] linked? If so, how many mapunits separate them?b. The data in part (a) do not indicate on which sideof the P[w+] (toward the centromere or…