
first of all you have to
determine offsprings which have parental in highest no. and double
cross over in least no.
Do D. C.O. in parental by making different orders of genes.
As the parental gives the same result as D.C.O. conferms that this is the order of genes.
Than obtain frequancy of cross over between two genes.
Than solve as i solved
Help More Triple cross practice! Green fruit (g), hairy stems (h), and quick ripening (4) are...
36. The recessive autosomal maize genes sh and bz are linked and 40 map units apart, If a plant with the genotype sh bz/ sh bz is selfed, what percentage of the progeny will be double recessive? 37. If the recombination frequency between the linked autosomal genes A and B in Drosophila is 15 percent, what phenotypic frequencies would you expect from a cross AB/ab females x AB/ab males? (There is no crossing over in Drosophila males). 38. In the...
6. Fine spines (s), smooth fruit (tu), and uniform color (u) are three recessive traits in cucumbers. These genes are linked on the same chromosome. A cucumber plant heterozygous for all three traits is used in the testcross, and the following offspring are obtained: SU CCCCCC Reuuuna a) Determine the order of the genes on the chromosome. b) Calculate the map distances between the genes. c) Calculate the coefficient of coincidence and the interference among the genes. total: 230
Use the following information for the next five questions: five spines (s), smooth fruit (t), and uniform fruit color (u) are three recessive traits in cucumbers and the genes for these traits are linked on the same chromosome. A cucumber plant heterozygous for all three genes is used in a test-cross, and the following progeny are obtained: SUT 2 suT 21 SuT 70 sut 4 SUt 21 sUt 82 sUT 13 Sut 17 Total: 230 1. What are the order...
Mapping genes with recombination frequencies in Drosophila 1. Suppose you know of three linked loci on the Drosophila X chromosome (a, b, and c). Assume that you are starting out with true-breeding stocks that show all three recessive traits and true-breeding stocks that show all three dominant traits. A. If you wanted to do a 3-point test cross to map the three loci, how would you set up the cross? What genotypes do you use for males and females in...
Mapping genes with recombination frequencies in Drosopna 1. Suppose you know of three linked loci on the Drosophila X chromosome (a, b, and c). Assume that you are starting out with true-breeding stocks that show all three recessive traits and true-breeding stocks that show all three dominant traits. A. If you wanted to do a 3-point test cross to map the three loci, how would you set up the cross? What genotypes do you use for males and females in...
Question 5 (14 marks) The allele cn gives fruit flies cinnabar eyes, whereas the allele cn gives red, the wild-type phenotype. The allele wx of a separate allele gives waxy wings, and wx gives non-waxy wings (wild-type). The allele b of a third gene gives fruit flies a black body, whereas the allele b gives a brown (wild-type) body colour. A geneticist knows these three genes are on the same chromosome, but does not know what order the genes are...
4. You are studying three genes in corn and performed a three-point cross. The three genes are green (V) vs Viniscent (V) seedlings, blue (Pr) vs red kernels (pr) and white (B ) or brown (bm) leaf midrib color. The table below list the offspring resulting from a testcross with a female F1 heterozygote. Type of gamete (NR, SCO, DCO Phenotype Progeny Gamete from F1 heterozygote Virescent seedling red 101 kernel Red kernel 175 Red kernel, brown midrib 259 Virescent...
Practice questions for BIO 340 (Exam 2) I need help with these
questions Please. WILL GIVE GOOD RATING
1. Wild type blue-eyed mary has blue flowers. Two genes control the pathway that makes the blue pigment: The product of gene W turns a white precursor into magenta pigment. The product of gene M turns the magenta pigment into blue pigment. Each gene has a recessive loss-of-function allele: w and m, respectively. A double heterozygote (Ww Mm) is self-pollinated. What proportion...