Homework Answers
Hypothesis -
Results do not fit the 1:1 ratio. Since the P value is greater than 0.05, we can accept the hypothesis.
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A mating between a heterozygous individual and a homozygous recessive individual results in 11 heterozygous progeny...
a monohybrid cross between two heterozygous individuals results in 48 progeny with the dominant phenotype and...
a monohybrid cross between two heterozygous individuals results in 48 progeny with the dominant phenotype and 12 progeny with the recessive phenotype. You would like to determine if these results are significantly different from the expected ratios and you conduct a chi-square-test. What is the chi-square value?
what is the difference between heterozygous and homozygous individuals
What is the difference between heterozygous and homozygous individuals? Homozygotes have one chromosome while heterozygotes have two similar chromosomes. The homozygote will express the dominant trait and the heterozygote will express the recessive trait. All of the gametes from a homozygote carry the same version of the gene while those of a heterozygote will differ. Heterozygotes carry two copies of a gene while homozygotes only carry one. When constructing a Punnett square, the symbols on the outside of the boxes...
Drosophilia homozygous for the lobed eye mutation (L) were mated with flies homozygous for a wing...
Drosophilia homozygous for the lobed eye mutation (L) were mated with flies homozygous for a wing mutation known as plexus (px) All the f1 progeny had lobed eyes and wild type wings. The F1 flies were test crossed resulting in the following progeny: Number 18 F2 phenotypes Wild type eyes and wings Lobed eyes Plexus wings Lobed eyes and plexus wings 35 33 14 Write the genotypes of the parental and f1 flies. Use proper drosophilia nomenclature. Be sure to...
5. In flower beetles, pygmy (py) is recessive to normal size (py*), and red color (r)...
5. In flower beetles, pygmy (py) is recessive to normal size (py*), and red color (r) is recessive to brown (r). A beetle heterozygous for these characteristics was test crossed to a beetle homozygous for pygmy and red. The progeny phenotypes from this testcross are shown below. py 180 ey 22 Py 19 2x r191 Total412 What is the frequency of recombination between these two genes? Carry out a series of chi-square tests to determine if these genes are assorting...
GENETICS: Assume that a cross is made between a heterozygous tall pea plant and a homozygous...
GENETICS:
Assume that a cross is made between a heterozygous tall pea plant and a homozygous short pea plant. Fifty offspring are produced in the following frequency: 30 = tall; 20 = short What frequency of tall and short plants is expected? Compute a Chi-square value associated with the appropriate test of significance. How many degrees of freedom are associated with this test of significance?
Could you verify that my answers are correct, please. 6. A homozygous strain of yellow corn...
Could you verify that my answers are correct, please.
6. A homozygous strain of yellow corn is crossed with a homozygous strain of pürple corn. The F1 are yellow kernels (the progeny)- a) Does the pattern of inheritance follow a monohybrid cross for a simple dominant trait? Explain using a chi-squared analysis ellow kerrel s tntercrossed, producing an ear of corm with 119 purple kernels and 89 to df I P<0 005 b) Propose another hypothesis for the method of...
Testing the goodness of fit between the data and the Hardy Weinberg equilibrium model generated expectations....
Testing the goodness of fit between the data and the Hardy Weinberg equilibrium model generated expectations. 4.1 In a species of bird, feather color is controlled by genes at a single locus, with the red feather allele dominant to the yellow feather allele. A population has 22 red and 14 yellow birds, with 9 of the red birds having a homozygous dominant genotype. Is this population in equilibrium? Calculate p and q from the number of individuals of each genotype:...
2. In a testcross of a female Drosophila heterozygous for three linked recessive genes, the following...
2. In a testcross of a female Drosophila heterozygous for three linked recessive genes, the following phenotypes of progeny were obtained: 442 435 at bt d a bd at bd a bt d at bd a bt di at bt dt a bd Total ONEN 1000 A) Write out the parental genotype of the heterozygous parent indicating the correct allele configuration and gene order B) Construct a map of the genes and indicate the map-distances based on the data shown...
2 scientists self - fertilize a blue flowered daisy and grow 100 progeny plants that consist...
2 scientists self - fertilize a blue flowered daisy and grow 100 progeny plants that consist of 55 blue - flowered plant, 22 purple - flowered plants and 23 white - flowered plants. One of them believes this is the result of segregation of two alleles at one locus and that progeny ratio is 1:2:1. The other think the progeny phenotypes are the result of two epistatic genes that the ratio is 9:3:4. They both ask you to resolve their...
A dihybrid cross is performed in Drosophila - one parent is heterozygous for both genes (B/b...
A dihybrid cross is performed in Drosophila - one parent is heterozygous for both genes (B/b ; F/f) and is test-crossed with a homozygous recessive type (b/b ; f/f). (where B = black body; b = brown body; F = forked bristles; f = unforked bristles.) The results are: black, forked 230 black, unforked 210 brown, forked 240 brown, unforked 250 How many degrees of freedom would you use in this case? What would be the expected number for each...
What is the difference between heterozygous and homozygous individuals? Homozygotes have one chromosome while heterozygotes have two similar chromosomes. The homozygote will express the dominant trait and the heterozygote will express the recessive trait. All of the gametes from a homozygote carry the same version of the gene while those of a heterozygote will differ. Heterozygotes carry two copies of a gene while homozygotes only carry one. When constructing a Punnett square, the symbols on the outside of the boxes...
Drosophilia homozygous for the lobed eye mutation (L) were mated with flies homozygous for a wing mutation known as plexus (px) All the f1 progeny had lobed eyes and wild type wings. The F1 flies were test crossed resulting in the following progeny: Number 18 F2 phenotypes Wild type eyes and wings Lobed eyes Plexus wings Lobed eyes and plexus wings 35 33 14 Write the genotypes of the parental and f1 flies. Use proper drosophilia nomenclature. Be sure to...
5. In flower beetles, pygmy (py) is recessive to normal size (py*), and red color (r) is recessive to brown (r). A beetle heterozygous for these characteristics was test crossed to a beetle homozygous for pygmy and red. The progeny phenotypes from this testcross are shown below. py 180 ey 22 Py 19 2x r191 Total412 What is the frequency of recombination between these two genes? Carry out a series of chi-square tests to determine if these genes are assorting...
GENETICS:
Assume that a cross is made between a heterozygous tall pea plant and a homozygous short pea plant. Fifty offspring are produced in the following frequency: 30 = tall; 20 = short What frequency of tall and short plants is expected? Compute a Chi-square value associated with the appropriate test of significance. How many degrees of freedom are associated with this test of significance?
Could you verify that my answers are correct, please.
6. A homozygous strain of yellow corn is crossed with a homozygous strain of pürple corn. The F1 are yellow kernels (the progeny)- a) Does the pattern of inheritance follow a monohybrid cross for a simple dominant trait? Explain using a chi-squared analysis ellow kerrel s tntercrossed, producing an ear of corm with 119 purple kernels and 89 to df I P<0 005 b) Propose another hypothesis for the method of...
2. In a testcross of a female Drosophila heterozygous for three linked recessive genes, the following phenotypes of progeny were obtained: 442 435 at bt d a bd at bd a bt d at bd a bt di at bt dt a bd Total ONEN 1000 A) Write out the parental genotype of the heterozygous parent indicating the correct allele configuration and gene order B) Construct a map of the genes and indicate the map-distances based on the data shown...
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