EBK CONCEPTS OF GENETICS
12th Edition
ISBN: 9780134818979
Author: Killian
Publisher: YUZU
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Chapter 5, Problem 2NST
With two pairs of genes involved (P/p and Z/z), a testcross (ppzz) with an organism of unknown genotype indicated that the gametes produced were in the following proportions:
PZ, 42.4%; Pz, 6.9%; pZ, 7.1%; pz, 43.6%
Draw all possible conclusions from these data.
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Students have asked these similar questions
Consider the following three point trihybrid testcross ibvolving traits in dragons. The genotypes determining the 8 progeny types from this testxross are shown below out of a sample of 1572 flies. What number of progeny for each genotype would you predict in the case of independent assortment.
gametes number
K L M 621
klm 608
k L M 103
K lm 109
K lm 64
k L m 57
K L m 3
k l M 7
A presumed dihybrid in Drosophila, BbFf is testcrossed with bbff. (B-black body, b-brown body, F-forked bristles, f-unforked bristles) The results for the testcross are below:
Black, forked: 230
Black, unforked: 210
Brown, forked: 240
Brown, unforked: 250
Determine the expected values and ratios for each genotype.
I have a vial of F2 offspring resulting from a two-generation cross between true-breeding wildtype females and true-breeding pink-bodied males. I scored F2 phenotypes for a total of 120 flies and obtain the following data:
Based on the above observed data in the chart, determine the expected number of flies for the following three scenarios provided in a-c below. Show work for each calculation.
2) The mutant allele is dominant and is located on an autosome
Chapter 5 Solutions
EBK CONCEPTS OF GENETICS
Ch. 5 - In a family with one autistic child the risk for...Ch. 5 - Given that the prenatal test can provide only a...Ch. 5 - Consider two hypothetical recessive autosomal...Ch. 5 - With two pairs of genes involved (P/p and Z/z), a...Ch. 5 - In Drosophila, a heterozygous female for the...Ch. 5 - HOW DO WE KNOW? In this chapter, we focused on...Ch. 5 - Review the Chapter Concepts list on page 94. Most...Ch. 5 - Describe the cytological observation that suggests...Ch. 5 - Why does more crossing over occur between two...Ch. 5 - Explain why a 50 percent recovery of...
Ch. 5 - Why are double-crossover events expected less...Ch. 5 - What is the proposed basis for positive...Ch. 5 - What two essential criteria must be met in order...Ch. 5 - The genes dumpy (dp), clot (cl), and apterous (ap)...Ch. 5 - Colored aleurone in the kernels of com is due to...Ch. 5 - In the cross shown here, involving two linked...Ch. 5 - In a series of two-point mapping crosses involving...Ch. 5 - Two different female Drosophila were isolated,...Ch. 5 - In Drosophila, a cross was made between femalesall...Ch. 5 - Another cross in Drosophila involved the...Ch. 5 - In Drosophila, Dichaete (D) is a mutation on...Ch. 5 - Drosophila females homozygous for the third...Ch. 5 - In Drosophila, two mutations, Stubble (Sb) and...Ch. 5 - If the cross described in Problem 18 were made,...Ch. 5 - Are mitotic recombinations and sister chromatid...Ch. 5 - What possible conclusions can be drawn from the...Ch. 5 - An organism of the genotype AaBbCc was testcrossed...Ch. 5 - Based on our discussion of the potential...Ch. 5 - Traditional gene mapping has been applied...Ch. 5 - DNA markers have greatly enhanced the mapping of...Ch. 5 - In a certain plant, fruit is either red or yellow,...Ch. 5 - Two plants in a cross were each heterozygous for...Ch. 5 - A number of humanmouse somatic cell hybrid clones...Ch. 5 - A female of genotype produces 100 meiotic tetrads....Ch. 5 - In laboratory class, a genetics student was...Ch. 5 - Drosophila melanogaster has one pair of sex...Ch. 5 - In Drosophila, a female fly is heterozygous for...Ch. 5 - The gene controlling the Xg blood group alleles...Ch. 5 - Prob. 34ESP
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