14Mapping - If a female Drosophila with the genotype b pr b...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Mapping Techniques Determining the genetic distance between linked genes: theory Genes A and E: Genes A and D: Genes A and B: Genes A and C: Determining the genetic distance between linked genes: 3-point mapping A female Drosophila heterozygous for purple eyes, vestigial wings, and black body is crossed to a male homozygous recessive (mutant) for all three traits. 1000 progeny are produced, with the following phenotypes: pr b vg 57 pr + b + vg + 62 pr + b vg 26 pr b + vg + 28 pr + b + vg 416 pr b vg + 405 pr + b vg + 4 pr b + vg 2 Diagram the female parent’s genotype and indicate the genetic distance between the genes. Using the genetic distance to determine progeny for linked genes
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: If a female Drosophila with the genotype b + pr / b pr + is mated with a male that is b pr / b pr, what are the expected genotype ratios for their progeny? You need to know whether genes are independent or linked, and, if linked, the genetic distance between them. Determining the physical location of sequences on chromosomes: physical mapping fluorescence in situ hybridization (FISH), Figure 20.4 p 555 karyotype Giemsa stain G-banding, Figure 8.1 p. 195 p arm and q arm 24 A A a a D d d D E E e e c c C C B B b b...
View Full Document

This note was uploaded on 04/22/2008 for the course BIO 325 taught by Professor Saxena during the Spring '08 term at University of Texas.

Ask a homework question - tutors are online