Homework Answers
Maternal effect genes determine the phenotype of the progeny based on the genotype of the mother. These genes are present in the oocyte even before it undergoes fertilization to form a zygote. Hence, maternal effect genes do not depend on the genotype of the father. So if the mother has both recessive phenotype then the progeny will be defective irrespective of the father's genotype. In the given case, we see that m allele is the recessive allele. So presence of homozygous recessive in the mother will produce defective progeny. So females with m/m mutation will produce defects.
So the correct option is: Option 4 and 5.
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With regards to maternal effect genes, which of the following crosses...
With regards to maternal effect genes, which of the following crosses would produce defective progeny? +...
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 male x +/m female +/m male x m/m female +/+male x m/m female m/m male x +/m female none of the above would produce defective progeny
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.
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...
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...
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....
1) Coat color in mice is determined by several independently assorting autosomal genes. Gene A is...
1) Coat color in mice is determined by several independently assorting autosomal genes. Gene A is involved in the distribution of pigment along the hair. A dominant allele (A) produces a hair color called "agouti"--the hair has dark pigment at the base and tip of each hair shaft and yellow pigment in the central portion of the shaft. Homozygous recessive mice (aa) are missing the yellow stripe and thus have solid dark-colored hair. Gene B is involved in the color...
A cross was made between a male fruit fly with purple eyes and two different female...
A cross was made between a male fruit fly with purple eyes and two different female flies with red eyes. The first female produced 41 progeny that all had red eyes, whereas the second female produced 18 progeny with red eyes and 21 progeny with purple eyes. a. Diagram the two crosses in words (you don't need to show the genotypes yet). b. Which eye color is dominant and which is recessive? How do you know? c. Choose a symbol...
Please help me solve these review problems, please show work it'll help me understand how to...
Please help me solve these review problems, please show
work it'll help me understand how to solve them if on my upcoming
exam. Thank you, and I will be sure to give thumbs up.
If short hair (L) is dominant to long hair (I) and black hair (B) is dominant to brown (b) then to determine the genotype of a black short haired animal it should be crossed with c. llBb d. lbb e. Llbb White eyes is an X-linked...
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 male x +/m female +/m male x m/m female +/+male x m/m female m/m male x +/m female none of the above would produce defective progeny
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.
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...
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...
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....
A cross was made between a male fruit fly with purple eyes and two different female flies with red eyes. The first female produced 41 progeny that all had red eyes, whereas the second female produced 18 progeny with red eyes and 21 progeny with purple eyes. a. Diagram the two crosses in words (you don't need to show the genotypes yet). b. Which eye color is dominant and which is recessive? How do you know? c. Choose a symbol...
Please help me solve these review problems, please show
work it'll help me understand how to solve them if on my upcoming
exam. Thank you, and I will be sure to give thumbs up.
If short hair (L) is dominant to long hair (I) and black hair (B) is dominant to brown (b) then to determine the genotype of a black short haired animal it should be crossed with c. llBb d. lbb e. Llbb White eyes is an X-linked...
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