Given your answers to below problem, is it possible to distinguishbetween the Protenor and Lygaeus mode of sex determinationbased on the outcome of these crosses? Probelm An insect species is discovered in which the heterogametic sex isunknown. An X-linked recessive mutation for reduced wing (rw)is discovered. Contrast the F1 and F2 generations from a crossbetween a female with reduced wings and a male with normalsizedwings when(a) the female is the heterogametic sex.(b) the male is the heterogametic sex.

Given your answers to below problem, is it possible to distinguishbetween the Protenor and Lygaeus mode of sex determinationbased on the outcome of these crosses? Probelm An insect species is discovered in which the heterogametic sex isunknown. An X-linked recessive mutation for reduced wing (rw)is discovered. Contrast the F1 and F2 generations from a crossbetween a female with reduced wings and a male with normalsizedwings when(a) the female is the heterogametic sex.(b) the male is the heterogametic sex.

Name: Given your answers to below problem, is it possible to distinguishbetw
Uploaded: 2024-03-20T06:42:55.000Z
Channel: Bartleby
Description: Given your answers to below problem, is it possible to distinguishbetween the Protenor and Lygaeus mode of sex determinationbased on the outcome of these crosses?ProbelmAn insect species is discovered in which the heterogametic sex isunknown. An X-li

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter14: Human Inheritance

Section: Chapter Questions

Problem 2GP: Human females have two X chromosomes XX; males have one X and one Y chromosome XY. a. With respect...

See similar textbooks

Similar questions

Let’s suppose that a gene affecting pigmentation is found on the Xchromosome (in mammals or insects) or the Z chromosome (in birds)but not on the Y or W chromosome. It is found on an autosome inbees. This gene exists in two alleles: D (dark) is dominant to d (light).What would be the phenotypic results of crosses between true-breedingdark females and true-breeding light males, and the reciprocal crossesinvolving true-breeding light females and true-breeding dark males,in the following species? Refer back to Figures 4.1 and 4.2 for themechanism of sex determination in these species.A. BirdsB. Fruit fliesC. BeesD. Humans
Butterflies have an X-Y sex-determination system that is different from that of flies or humans. Female butterflies may be either XY or X0, while butterflies with two or more X chromosomes are males. This photograph shows a tiger swallowtail gynandromorph, which is half male (left side) and half female (right side). Given that the first division of the zygote divides the embryo into the future right and left halves of the butterfly, propose a hypothesis that explains how nondisjunction during the first mitosis might have produced this unusual-looking butterfly. Question is also in the picture.
Drosophila have XX/XY sex determination systems just like mammals. In Drosophila, loci for both eye color and body color are on the X chromosome. Red eye color (R) is dominant to white eye color (r), and tan body color (T) is dominant to yellow body color (t). Which of the following is the genotype for a female with a yellow body and red eyes, who is homozygous for eye color? Group of answer choices XRT XrT XRt XRT XRt XRt XRt XRT
What is the correct table in these two given? 1. Take two coins and assume that heads represent the dominantallele (A) and tails represents the recessive allele (a). The genotype for each coin isheterozygous (Aa).2. Assume that each coin represents one parent. When a single coin is flipped, one gameteis formed (through the process of meiosis). If the flipped coin is on heads, then thegamete has the dominant allele (A). When both coins are flipped simultaneously, therewill be two possible gametes that can combine through fertilization to form a zygote. Eachtime you flip both coins, you will record the “genotype” of the offspring.3. Flip the coins 100 times and record your results in the chart below
Let’s suppose that two different X-linked genes exist in mice,designated with the letters N and L. Gene N exists in a dominant,normal allele and in a recessive allele, n, that is lethal. Similarly,gene L exists in a dominant, normal allele and in a recessive allele,l, that is lethal. Heterozygous females are normal, but males thatcarry either recessive allele are born dead. Explain whether or notit would be possible to map the distance between these two genesby making crosses and analyzing the number of living and deadoffspring. You may assume that you have strains of mice in whichfemales are heterozygous for one or both genes.
In Drosophila, a cross was made between females expressing thethree X-linked recessive traits, scute bristles (sc), sable body (s),and vermilion eyes (v), and wild-type males. All females were wildtype in the F1, while all males expressed all three mutant traits.The cross was carried to the F2 generation and 1000 offspringwere counted, with the results shown in the following table. Nodetermination of sex was made in the F2 data. Question:Calculate the coefficient of coincidence; does this represent positive or negative interference? Phenotype Offspringsc s v 314+ + + 280+ s v 150sc + + 156sc + v 46+ s + 30sc s + 10+ + v 14
Red-green colorblindness is determined in humans by a single X-linked locus. Colorblind males are XbY, and males with normal vision are XBY. XB is dominant, so XBXB and XBXb females have normal vision, while XbXb females are colorblind. Typically, 8% of males are red-green colorblind. Assuming H-W equilibrium, what percentage of females is typically colorblind?
Choose correct option and do explain. Considering an X-linked dominant trait, if an affected woman and an unaffected man decide to have children, which of the answer choices is possible for their children? a. All of their sons are expected to show the dominant trait. b. Their daughters are expected be heterozygous for the gene. c. Their daughters are not expected to show the dominant trait. d. Their sons are expected to be heterozygous for the gene. e. All their children, whether male or female, are expected to show the dominant trait.
Recall that red color (R) in four-o’clock flowers is incompletely dominant over white (R ′). In the following crosses, give the genotypes of the gametes produced by each parent and the flower color of the offspring: R/R ′×R/R ′; R′/R ′×R/R ′; R/R×R/R ′; R/R×R′/R ′
(This one is more complicated). Two true breeding fruit flies are allowed to mate. One fly ishomozygous dominant for body color and eye color while the other is homozygous recessive forbody color and eye color. (g+:gray body, g:black body, e+:ebony eyes, e:red), The F1 flies areallowed to mate. What are the following probabilities in the F2 generation? For this problemmake sure to show the Punnett Square for your F2 generation and all of your calculations. Youdo not need to show the Punnett Square for the F1 generation. Answer in percent and round to 2decimals.a. Two of three fruit flies are gray and red.b. The first fruit fly is gray and ebony, the second fruit fly is gray and red, and the third fruit fly is black and ebony.
In the fruit fly, Drosophila melanogaster, a spineless (no wing bristles) female fly ismated to a male that is claret (dark eyes) and hairless (no thoracic bristles).Phenotypically wild-type F1 female progeny were mated to fully homozygous (mutant)males, and the following progeny (1000 total) were observed: Phenotypes Number Observed spineless 321wild 38claret, spineless 130claret 18claret, hairless 309hairless, claret, spineless 32hairless 140hairless, spineless 12(a) Which gene is in the middle? (b) With respect to the three genes mentioned above, what are the genotypes of thehomozygous parents used in making the phenotypically wild F1 heterozygote? explain it. (c) What are the map distances between the three genes? explain it. (d) What is the coefficient of coincidence? explain it.
The recessive allele s causes Drosophila to have small wings, and the s+ allele causes normal wings. This gene is known to be X linked. If a small-winged male is crossed with a homozygous wild-type female, what ratio of normal to small-winged flies can be expected in each sex in the F1? If F1 flies are intercrossed, what F2 progeny ratios are expected? What progeny ratios are predicted if F1 females are backcrossed with their father?