Homework Answers
Bicoid mutation is recessive
Bicoid normal gene = B
Mutant allele = b
Bicoid heterozygous crossed
Bb × Bb
BB : Bb : bb
1: 2: 1
BB,Bb - normal head ( 3/4)
bb- mutant
3 out of 4 (3/4) are the chances that , first progeny will have normal head.
In maternal effect gene prod
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The bicoid mutant is recessive, and the Bicold gene is a maternal effect gene that leads...
Question 47 of 50 4.0 Points The bicold mutant is recessive, and the Bicold gene is...
Question 47 of 50 4.0 Points The bicold mutant is recessive, and the Bicold gene is a maternal effect gene that leads to proper development of the head region in fllos. Two flies that are heterozygous for the blooid mutant are crossed. What are the chances that the first progeny will have normal head development Show your work for full credit. Describe why a gene would have a maternal effect phenotype. (Hint where is the protein or mRNA of a...
Part C If loss of bicoid function in the egg leads to lethality during embryogenesis, how...
Part C If loss of bicoid function in the egg leads to lethality during embryogenesis, how are females homozygous for bicoid produced? O Homozygous bicoid mutant females (and males) can be produced by crossing male and female +/bicoid heterozygotes. O Homozygous bicoid mutant females (and males) can be produced by crossing male and female +/bicoid heterozygotes. In order to develop normally, the eggs resulting from this cross should be supplied with normal bicoid protein. This can be achieved by introducing...
Review This pedigree shows the inheritance pattern of a recessive maternal effect gene in Drosophila. In...
Review This pedigree shows the inheritance pattern of a recessive maternal effect gene in Drosophila. In maternal effect, the offspring's phenotype is under the control of nuclear gene products present in the mother's egg. In this example, the presence of the at allele in the mother is required for proper wing development in the offspring. Submit Previous Answers Correct In the pedigree, individuals who are wingless are indicated by a shaded symbol. The phenotypes and genotypes are only provided for...
II Review a tla + This pedigree shows the inheritance pattern of a recessive maternal effect...
II Review a tla + This pedigree shows the inheritance pattern of a recessive maternal effect gene in Drosophila. In maternal effect, the offspring's phenotype is under the control of nuclear gene products present in the mother's egg. In this example, the presence of the a + allele in the mother is required for proper wing development in the offspring. a tla a/a In the pedigree, individuals who are wingless are indicated by a shaded symbol. The phenotypes and genotypes...
Question : The CDKN1C gene is a maternally imprinted gene that is important for fetal development....
Question : The CDKN1C gene is a maternally imprinted gene that is important for fetal development. Mice that are homozygous null for CDKN1C, meaning no expression of the CDKN1C gene, have an overgrowth phenotype during fetal development and are large. a. ) A female mouse is heterozygous for a null allele of the CDKN1C gene. The null allele was inherited from her paternal parent and the allele inherited from her maternal parent is the wildtype DNA sequence of the CDKN1C...
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...
FIVE. You have identified a new mutant in Drosophila that defines a gene you call “red.” When mutant it causes the “neck” of the fly (cervical connective) to be red. It behaves as an autosomal recessi...
FIVE. You have identified a new mutant in Drosophila that defines a gene you call “red.” When mutant it causes the “neck” of the fly (cervical connective) to be red. It behaves as an autosomal recessive mutation with alleles red+ and red-. You suspect it is linked to two known genes on the second chromosome “re” and “ti”. The re- mutation behaves as an autosomal recessive. Homozygous mutant flies fixate on TV reruns, “re+” normal flies avoid TV. The “ti”...
Biol 210: Genetics. Assign. #1 #5) You are studying a gene for body colour in house...
Biol 210: Genetics. Assign. #1 #5) You are studying a gene for body colour in house flies. The wild-type allele (B) has a dark blue phenotype. In population screens you find 6 recessive mutants B' through B$ and establish homozygous strains, all of which have a pale blue phenotype. You cross each mutant strain to itself and to all the other mutant and wild type lines and observe the following results (+ = wild- type phenotype in F1, -= mutant...
The genes for sepia eye color, short bristles, and dark body coloration are on the same...
The genes for sepia eye color, short bristles, and dark body coloration are on the same chromosome of Drosophila melanogaster. Each gene has two alleles: wild type, which is dominant, or mutant, which is recessive. se+ is dominant and causes red eyes; se is recessive and causes sepia eyes sb+ is dominant and causes long bristles; sb is recessive and causes short bristles b+ is dominant and causes gray body coloration; b is recessive and causes dark...
You are studying mice and you discover a maternal effect gene you call pinto. pinto mRNA...
You are studying mice and you discover a maternal effect gene you call pinto. pinto mRNA is localized to the anterior end of the embryo and promotes the formation of posterior structures. Mutations in the pinto gene are recessive. In a cross between a male (genotype: Nn) and a female (genotype: nn), how many of the embryos will have defects in their posterior structures? O A) 0% OB) 100% OC) 25% OD) 50%
Question 47 of 50 4.0 Points The bicold mutant is recessive, and the Bicold gene is a maternal effect gene that leads to proper development of the head region in fllos. Two flies that are heterozygous for the blooid mutant are crossed. What are the chances that the first progeny will have normal head development Show your work for full credit. Describe why a gene would have a maternal effect phenotype. (Hint where is the protein or mRNA of a...
Part C If loss of bicoid function in the egg leads to lethality during embryogenesis, how are females homozygous for bicoid produced? O Homozygous bicoid mutant females (and males) can be produced by crossing male and female +/bicoid heterozygotes. O Homozygous bicoid mutant females (and males) can be produced by crossing male and female +/bicoid heterozygotes. In order to develop normally, the eggs resulting from this cross should be supplied with normal bicoid protein. This can be achieved by introducing...
Review This pedigree shows the inheritance pattern of a recessive maternal effect gene in Drosophila. In maternal effect, the offspring's phenotype is under the control of nuclear gene products present in the mother's egg. In this example, the presence of the at allele in the mother is required for proper wing development in the offspring. Submit Previous Answers Correct In the pedigree, individuals who are wingless are indicated by a shaded symbol. The phenotypes and genotypes are only provided for...
II Review a tla + This pedigree shows the inheritance pattern of a recessive maternal effect gene in Drosophila. In maternal effect, the offspring's phenotype is under the control of nuclear gene products present in the mother's egg. In this example, the presence of the a + allele in the mother is required for proper wing development in the offspring. a tla a/a In the pedigree, individuals who are wingless are indicated by a shaded symbol. The phenotypes and genotypes...
Biol 210: Genetics. Assign. #1 #5) You are studying a gene for body colour in house flies. The wild-type allele (B) has a dark blue phenotype. In population screens you find 6 recessive mutants B' through B$ and establish homozygous strains, all of which have a pale blue phenotype. You cross each mutant strain to itself and to all the other mutant and wild type lines and observe the following results (+ = wild- type phenotype in F1, -= mutant...
You are studying mice and you discover a maternal effect gene you call pinto. pinto mRNA is localized to the anterior end of the embryo and promotes the formation of posterior structures. Mutations in the pinto gene are recessive. In a cross between a male (genotype: Nn) and a female (genotype: nn), how many of the embryos will have defects in their posterior structures? O A) 0% OB) 100% OC) 25% OD) 50%
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