Homework Answers
In case of maternal effect genes, the offsprings produced, exhibit the phenotype of the mother. This does not follow the Mendelian pattern of inheritance. Thus, if the mother is wild type, all of the offsprings will be wild type. On the other hand, if the mother is having the mutation (that is, if the mother is expressing the mutation), all of the offsprings will be mutated, no matter what the genotype of the father is.
Here, the given mutation is recessive. A recessive mutation is expressed only in homozygous condition. Thus, defective progeny will be produced, when the female is homozygous for the mutation, that is, her genotype is m/m. Hence, the cross given in the 2nd and the 3rd options will produce defective offsprings.
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With regards to maternal effect genes, which of the following crosses would produce defective progeny? +...
how do you solve this? With regards to maternal effect genes, which of the following crosses...
how do you solve this?
With regards to maternal effect genes, which of the following crosses would produce defective progeny? + = functioning allele, m = recessive maternal effect mutation. Select ALL that are correct. m/m male x +/m female none of the above would produce defective progeny +/m male x +/m female +/+male x m/m female +/m male x m/m female
Which of the following statements about maternal effect is true? In maternal effect, reciprocal crosses give...
Which of the following statements about maternal effect is true? In maternal effect, reciprocal crosses give identical results but with different ratios among male and female progeny. In maternal effect, the phenotype of the progeny does not necessarily depend on the individual's genotype but on the genotype of the maternal parent. In maternal effect, the genes are linked to the X chromosome. In maternal effect, a trait is transmitted through the ooplasm because the mitochondria and chloroplasts of the zygote...
A geneticist discovered a maternal effect gene in a new species of fly which controls the...
A geneticist discovered a maternal effect gene in a new species of fly which controls the formation of head and thorax segmental development. The progeny of female flies bearing at least one copy of the dominant allele m+ were found to develop normally. However, the allele m had a lethal penetrance of 28%. In a mating experiment performed by the geneticist a female fly with the genotype mm was mated with a male fly with the genotype m+m. Assume that...
Please explain the concept and how it does not follow Mendelian Inheritance Maternal effect 2 m/+...
Please explain the concept and how it does not follow
Mendelian Inheritance
Maternal effect 2 m/+ x oʻmit mit x oʻmim O m/m x Oʻmit m/m * ©*+/+ • m/m A m/m Am/+ m/+ • m/+ • +/+ • m/m • m/+ All offspring show the wild-type phenotype All offspring show the mutant phenotype Genetic crosses involving a maternal effect recessive mutation, m. The maternal genotype determines the phenotype of the offspring.
vields black aegene is r-quired to produce orange cas fur the recesstvo little o orange fur...
vields black aegene is r-quired to produce orange cas fur the recesstvo little o orange fur altemating with patterns of is allele of O allele of the X-linked orange wah gene yields black fur. Tortoisesheil cats have coats with patches of hich of the following terns of black fur 3. ) ange female oroses could produce a XX fama ortoise B. Black female x orange C. Orange female x o ange D. Two of the above couloace a female E....
Question 5 What proportions of the progeny of the following crosses, in which allele pairs are...
Question 5 What proportions of the progeny of the following crosses, in which allele pairs are assorting independently, will be homozygous? 1) AaBb x AaBb. 2) AaBbCC x AABBcc. 3) aabbcc x AAbbCC. Show your calculations or reasoning.
1. People wit h the sex-linked genetic disease, hemophilia, suffer from excessive bleeding because their blood...
1. People wit h the sex-linked genetic disease, hemophilia, suffer from excessive bleeding because their blood will not clot. Tom, Mary, and their 4 daughters do not exhibit symptoms of hemophilia. However, their son exhibits symptoms of hemophilia because: A) Tom is heterozygous B) Tom is homozygous C Mary is homozygous D) Mary is heterozygous E All of the above are equally likely What is the risk of having a child affected by disease with an autosomal recessive inheritance both...
The following Drosophila crosses were performed Cross 1 Parents: white-eyed straight winged male x red-eyed; curly...
The following Drosophila crosses were performed Cross 1 Parents: white-eyed straight winged male x red-eyed; curly winged female Progeny: all red-eyed flies, half of which are curly winged Cross 2 (reciprocal cross) Parents: red-eyed curly winged male x white-eyed straight winged female Progeny: white-eyed males and red-eyed females, half of each have curly wings. Test crosses with the curly winged progeny from cross 1 and 2 to homozygous straight winged flies resulted in all half curly and half straight winged...
Genetic Linkage The six genes listed below are all located on Chromosome 2 of Drosophila melanogaster....
Genetic Linkage The six genes listed below are all located on Chromosome 2 of Drosophila melanogaster. Your goal is to construct a genetic map of Chromosome 2. That is, determine the order of these genes along chromosome 2 and the map distance in centimorgans between each gene. To complete this task, you will be given the results of a variety of two-point test crosses involving these genes. For each test cross you may assume that the female is heterozygous and...
Which of the following is true regarding maternal effect genes? Group of answer choices Hunchback in...
Which of the following is true regarding maternal effect genes? Group of answer choices Hunchback in initially expressed throughout the cytoplasm Torso in initially activated throughout the cytoplasm Nanos is initially expressed only in the anterior cytoplasm Caudal is expressed initially only in the posterior cytoplasm Bicoid is initially expressed only in the posterior cytoplasm
how do you solve this?
With regards to maternal effect genes, which of the following crosses would produce defective progeny? + = functioning allele, m = recessive maternal effect mutation. Select ALL that are correct. m/m male x +/m female none of the above would produce defective progeny +/m male x +/m female +/+male x m/m female +/m male x m/m female
Please explain the concept and how it does not follow
Mendelian Inheritance
Maternal effect 2 m/+ x oʻmit mit x oʻmim O m/m x Oʻmit m/m * ©*+/+ • m/m A m/m Am/+ m/+ • m/+ • +/+ • m/m • m/+ All offspring show the wild-type phenotype All offspring show the mutant phenotype Genetic crosses involving a maternal effect recessive mutation, m. The maternal genotype determines the phenotype of the offspring.
vields black aegene is r-quired to produce orange cas fur the recesstvo little o orange fur altemating with patterns of is allele of O allele of the X-linked orange wah gene yields black fur. Tortoisesheil cats have coats with patches of hich of the following terns of black fur 3. ) ange female oroses could produce a XX fama ortoise B. Black female x orange C. Orange female x o ange D. Two of the above couloace a female E....
1. People wit h the sex-linked genetic disease, hemophilia, suffer from excessive bleeding because their blood will not clot. Tom, Mary, and their 4 daughters do not exhibit symptoms of hemophilia. However, their son exhibits symptoms of hemophilia because: A) Tom is heterozygous B) Tom is homozygous C Mary is homozygous D) Mary is heterozygous E All of the above are equally likely What is the risk of having a child affected by disease with an autosomal recessive inheritance both...
The following Drosophila crosses were performed Cross 1 Parents: white-eyed straight winged male x red-eyed; curly winged female Progeny: all red-eyed flies, half of which are curly winged Cross 2 (reciprocal cross) Parents: red-eyed curly winged male x white-eyed straight winged female Progeny: white-eyed males and red-eyed females, half of each have curly wings. Test crosses with the curly winged progeny from cross 1 and 2 to homozygous straight winged flies resulted in all half curly and half straight winged...
Genetic Linkage The six genes listed below are all located on Chromosome 2 of Drosophila melanogaster. Your goal is to construct a genetic map of Chromosome 2. That is, determine the order of these genes along chromosome 2 and the map distance in centimorgans between each gene. To complete this task, you will be given the results of a variety of two-point test crosses involving these genes. For each test cross you may assume that the female is heterozygous and...
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