A gene that encodes collagen in an animal particiaptes to control size. An animal homozygous for the F allele are very large, and an animal homozygous for the f allele are very small. But, heterozygots have a medium size between these. This is an example of... Mendelian Dominance codominance plietrophy variable expression incomplete dominance

A gene that encodes collagen in an animal particiaptes to control size. An animal homozygous for the F allele are very large, and an animal homozygous for the f allele are very small. But, heterozygots have a medium size between these. This is an example of... Mendelian Dominance codominance plietrophy variable expression incomplete dominance

Name: A gene that encodes collagen in an animal particiaptes to control size
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Description: A gene that encodes collagen in an animal particiaptes to control size. An animal homozygous for the F allele are very large, and an animal homozygous for the f allele are very small. But, heterozygots have a medium size between these. This is an exa

Science Of Agriculture Biological Approach

5th Edition

ISBN:9780357229323

Author:Herren

Publisher:Herren

Chapter4: The Science Of Genetics

Section: Chapter Questions

Problem 1SLA

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A breeder is interested in a new coat colour in mice. This trait is controlled by a single autosomal gene (Gene T) with two alleles. The T-allele results in a yellow coat colour, while the recessive allele causes a cream coat colour. The breeder has a yellow mouse. Can you suggest how the breeder can determine the genotype (TT or Tt) of his mouse in a single cross? Describe this cross and provide details on how you would interpret the results.
In mice, the presence of AA alleles give rise to the agouti fur color, AAY gives rise to a yellow fur color, and AYAY is lethal, causing mice to die before birth. The B allele results in pigment formation and is dominant over the b allele. The bb genotype results in no pigment formation and gives an albino fur color irrespectively of the presence of the AA or AAY alleles. In the following cross between a yellow and agouti mice, what would be the expected proportion of agouti fur mice among the live offspring? AAY Bb X AA Bb 1/2 1/4 3/8 1/3 3/4
In Labrador retriever dogs, two alleles (B and b) determine whether coat colour will be black (B)or brown (b). Black coat colour is dominant. A second pair of alleles, E and e, are on a separatechromosome from B and b. The homozygous recessive condition, ee, prevents the expressionof either allele B or b, and produces a dog with a yellow-coloured coat. Some examples ofgenotypes and phenotypes for Labrador retrievers are shown below.Genotype PhenotypeBBEe blackbbEe brownBbee yellow Two dogs, each with the genotype, BbEe, were crossed. What is the percentageprobability that their offspring will have yellow coat colour? (Record your answer as awhole number percentage)
A cross between a black-furred male dog and a white-furred female dog could produce offspring with a black-and-white coat. This means that the color coat traits of the parents are codominant as both were expressed together. Show a cross between a Black-white furred dog and a homozygous white dog. Indicate the genotypes of both parents and the possible outcome in percentage.
Andalusian chickens may be either black, white, or gray. The gene for black is not dominant over the gene for white, nor is the gene for white dominant over the gene for black. When a black rooster is mated to a white hen, all gray chicks are produced. When gray chickens are mated, the chicks are black, gray, and white. Using a Punnett Square, demonstrate how feather color is inherited in Andalusian chickens. Is the inheritance of feather color in this problem an example of incomplete dominance? Why would it be impossible to establish a true breeding flock of gray Andalusian chickens? In guinea pigs, black coat color (B) is dominant to white (b), and a rough coat (R) is dominant to smooth (r). What are the expected genotypic and phenotypic results of the following crosses? BBRR x bbrr BBrr x bbRR Bbrr x bbRr BBRr x BbRr BbRr x BbRr A pure-breeding black, smooth guinea pig was mated to a pure-breeding white, rough female.They produced several litters,…
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A sex-influenced trait is dominant in males and causes bushy tails.The same trait is recessive in females. Fur color is not sex influenced.Yellow fur is dominant to white fur. A true-breeding femalewith a bushy tail and yellow fur was crossed to a white male withouta bushy tail (i.e., a normal tail). The F1 females were thencrossed to white males without bushy tails. The following resultswere obtained:A. Conduct a chi square analysis to determine if these two genesare linked.B. If the genes are linked, calculate the map distance betweenthem. Explain which data you used in your calculation.
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Wooly, curly hair is due to a rare dominant allele (H) and its recessive allele (h) produces straight hair. Another gene has 2 alleles: (B) dark hair is dominant over (b) blonde. A woman with wooly, blonde hair marries a man with straight, dark hair. Their daughter has straight, blonde hair. What phenotypes and in what proportions can they expect among future children?
raccoons may have wide, medium-sized, or narrow bands around their tails. They may also havethe habit of washing all, or some of their food, or do not wash their food at all. a) assign genotypes to the phenotypes mentioned (see attached table) b. What mode of inheritance would most likely be exhibited by these traits if crosses were made? c. If two raccoons with medium-sized tail bands and have the habit of washing some of theirfoods will be crossed, what is the probability of having F1 raccoons with: c.1 wide tail bands that won’t wash any of their food? c.2 the same genotype as the parent raccoons? d. If a raccoon with a wide tail band that washes only some of its food is crossed with a raccoonwith a narrow tail band that doesn’t wash any food, what percentage of their offspring wouldbe medium-tailed and washes all its food? Show COMPLETE cross.