+ ec +/Y+ + w/Yy ec +/Y+ ec +/y ec w++ w/y ec wу ес +у ес иDetermine the order in which the three loci y, ec, and wOccur on the chromosome and prepare a linkage map.7.22 A cross involving X-linked genes was made betweenyellow, bar, vermilion female fies and wild males, and the F1females were crossed with y B v males. The followingphenotypes were obtained when 1000 progeny were exam-ined:Draordmathe7.254624416050+ + ++ Bvy Bvy+ +y+vy B+andanandandand+B +re+ + vgeDetermine the order in which the three loci occur on thechromosome and prepare a linkage map.7.23 Female Drosophila heterozygous for ebony (e"le),scarlet (st*/st), and spineless (ss*/ss) were testcrossed, andthe following progeny were obtained:PROGENCY PHENOTYPESNUMBERirWild typeEbonyEbony, scarletEbony, spinelessEbony, scarlet, spinelessScarlet678.6834778368Scarlet, spinelessSpineless(a) Are these genes linked? Justify your answer. (b) Write thegenes given on a chromosome symbol with the genes incorrect order. (c) Write the genotypes of the flies involved inthe parental cross and testcross. (d) What is thebetween the loci for ebony and scarlet? (e) What is the mapdistance between the loci for ebony and spineless? (f) Cal-culate the coefficient of coincidence.1054mapdistance7.24 Consider a female Drosophila having the following Xchromosome constitution:dor*dor

Name: + ec +/Y+ + w/Yy ec +/Y+ ec +/y ec w++ w/y ec wу ес +у ес иDetermine
Uploaded: 2024-03-20T06:43:04.000Z
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Description: + ec +/Y+ + w/Yy ec +/Y+ ec +/y ec w++ w/y ec wу ес +у ес иDetermine the order in which the three loci y, ec, and wOccur on the chromosome and prepare a linkage map.7.22 A cross involving X-linked genes was made betweenyellow, bar, vermilion female