You continue your experiments with the black mutation on chromosome II. You cross the reciprocal translocation strain to the black pure line to generate F, flies that are bothtranslocation heterozygotes and Bb heterozygotes. As before, you testcross F¡ males and females in two separate experiments.F1 males x pure black females(Note: There is no crossing over inthe F1 males.)F, females x pure black males (Note: Crossing over may occur in the F,females.)Cross424 black, fully fertile426 wild-type, semi-sterile73 black, semi-sterile77 wild-type, fully fertile1/2 black, fully fertile1/2 wild-type, semi-sterileF2 ProgenyWhat can you conclude from these results? Select the three correct statements.The F2 progeny in both experiments contain recombinants.The F2 progeny contain recombinants only when F, females are testcrossed.None of the F2 progeny classes require crossing over.Some of the F2 progeny classes require crossing over; others do not.Chromosome Il is one of the chromosomes involved in the reciprocal balanced translocation.

Introduction: The most advancing branch of science is genetics. The study of genetics comprises…

Answered: You continue your experiments with the…

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter15: Genomes And Genomics

Section: Chapter Questions

Problem 2QP: Hemophilia and color blindness are both recessive conditions caused by genes on the X chromosome. To...

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Similar questions

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?
In your own words, explain why a testcross cannot produce more than 50% recombinant offspring. When a testcross does produce 50% recombinant offspring, what does this result mean?
Could you have generated a chromosome map from the F2 progeny in cross 1 (assuming you crossed F1 males and females to each other to generate the F2)? What is the advantage of using cross 2 instead?
When Calvin Bridges observed a large number of offspring from a cross of white-eyed female Drosophila tored-eyed males, he found very rare white-eyed femalesand red-eyed males among the offspring. He was ableto show that these exceptions resulted from nondisjunction, such that the white-eyed females had received twoXs from the egg and a Y from the sperm, while thered-eyed males had received no sex chromosome fromthe egg and an X from the sperm. What progeny wouldhave arisen from these same kinds of nondisjunctionalevents if they had occurred in the male parent? Whatwould their eye colors have been?
While working with Drosophila, you discover a mutant with green eyes. You first create a strain of fliesthat are pure-breeding for this mutation (but wild-type for everything else). You name the mutant genegrn and set out to discover which chromosome it is on and begin to map its location. In one experiment,you cross grn flies with min flies (miniature wings) to create flies that are hybrid for both traits (F1 flies).Then, you cross the F1 flies with each other to generate F2 flies.1.) What chromosome is the gene called “miniature wings” on? (Use the genetic map from thetextbook, also found in the PPT presentation for chapter 4.)2.) What percentage of the F2 flies will be double-mutant (green eyes and miniature wings)?Next, you perform another experiment. This time, you first take the F2 double-mutant flies from the firstcross and cross them with double wild-type flies to create a new batch of double-hybrids (F1).3.) Give the genotypes of the P1 cross described above.4.) Give the…
A crossover has occurred in the bivalent shown figure.If a second crossover occurs in the same region between these twogenes, which two chromatids would be involved to produce thefollowing outcomes?A. 100% recombinantsB. 0% recombinantsC. 50% recombinants
Let’s say there is an organism with two pairs of alleles, W/w and Z/z, each pair is located on a different pair of chromosomes in the organism’s somatic cells. During Prophase, what will you observe in the somatic cells?
In a fungus with four ascospores, a mutant allele lys-5causes the ascospores bearing that allele to be white,whereas the wild-type allele lys-5+ results in black ascospores. (Ascospores are the spores that constitute thefour products of meiosis.) Draw an ascus from each ofthe following crosses:a. lys-5 × lys-5+b. lys-5 × lys-5c. lys-5+ × lys-5+
Thorn apples produce either purple (P) or white (p) flowers, and their fruits are either spiny (S) or smooth (s). These two genes are located on non homologous chromosomes. a. What is/are the phenotypes and genotypes of the offspring that result from the cross PPss x PpSs? b. If the cross PpSS x ppSs is made, which of the following is/are not represented in the offspring? PpSS PpSs ppSS ppSs PPSs
Mitotic recombination can occasionally produce a twin spot.Let’s suppose an animal species is heterozygous for two genesthat govern fur color and length: one gene affects pigmentation,with dark pigmentation (A) dominant to albino (a); the other geneaffects hair length, with long hair (L) dominant to short hair (l).The two genes are linked on the same chromosome. Let’s assume ananimal of this species is AaLl; A is linked to l, and a is linked to L.Draw the chromosomes labeled with these alleles, and explainhow mitotic recombination could produce a twin spot with onespot having albino pigmentation and long fur and the other havingdark pigmentation and short fur.
In Drosophila, a cross was made between a yellowbodied male with vestigial (not fully developed)wings and a wild-type female (brown body). The F1generation consisted of wild-type males and wild-typefemales. F1 males and females were crossed, and theF2 progeny consisted of 16 yellow-bodied males withvestigial wings, 48 yellow-bodied males with normalwings, 15 males with brown bodies and vestigialwings, 49 wild-type males, 31 brown-bodied femaleswith vestigial wings, and 97 wild-type females.Explain the inheritance of the two genes in questionbased on these results.
Three autosomal genes are linked along the same chromosome.The distance between gene A and B is 7 mu, the distance betweenB and C is 11 mu, and the distance between A and C is 4 mu. Anindividual that is AA bb CC was crossed to an individual that is aaBB cc to produce heterozygous F1 offspring. The F1 offspring werethen crossed to homozygous aa bb cc individuals to produce F2offspring.Where would a crossover have to occur to produce an F2 offspringthat was heterozygous for all three genes?

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