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A farmer is interested in a new colour pattern in his breed of cattle. This trait is controlled by a single autosomal gene (Gene R) with two alleles. The R-allele results in a spotted colour pattern, while the recessive allele causes a solid colour. The farmer has a cow that has the spotted pattern. Can you suggest how the farmer can determine the genotype (RR or Rr) of his cow in a single cross? Describe this cross and provide details on how you would interpret the results.
The test cross is a cross between F1 generation hybrid individuls with the recessive indivisual. This the the cross also called as test cross ,it is primarily used to know the genotype of indivisuals.
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- Refer to the pedigree below for this question. Individuals who are shaded have a rare autosomal recessive disorder. Those who are not shaded have the dominant phenotype. Let "A' and "a" represent the dominant and recessive alleles, respectively. Fill in the probability functions below to indicate the genotype or probability function for the genotype of each individual. Give all probabilities as fractions that are simplified to the lowest value. Type your fractions in ## format without spaces. For example, one-half should be typed as 1/2. Place a zero in each space that does not have a number. Failure to follow these instructions will result in your answer being marked as incorrect. Note that two of the individuals have been completed for you as examples. Individual 1-3 is genotype O AA + 1 Aa +0 aa Individual II-4 is genotype 1/3 AA + 2/3 Aa + 0 aa Individual 1-6 is genotype AA + Aa + aa Individual II-1 is genotype Aa + AA + aa Individual II-5 is genotype AA + Aa + aa Individual II-7…Cystic fibrosis (CF) is an autosomal recessive trait. A three-generation pedigree is shown below for a family that carries the mutant allele for cystic fibrosis. Note that carriers are not colored in to allow you to figure out their genotypes. Normal allele = F CF mutant allele = f What is the genotype of individual #13? A) ff B) FF C) Ff D) it is impossible to tellA horse breeder for the Kentucky Derby recently noticed that one of his female horses gave birth to an offspring, a daughter horse, that had several desirable traits to be a successful racing horse. The offspring had a well-chiseled head on a long neck, high withers, a deep chest, a short back, good depth of hindquarters, a lean body, and long legs. The farmer would like to identify which male horse is the offspring’s father for selective breeding purposes. He asks a local university to run a DNA fingerprint with DNA samples from the mother, offspring, and the four male horses on the farm.
- In corn the genes for tassel length (alleles T and t) and rust resistance (alleles R and r) are known to be on separate chromosomes. In the course of a routine mating check experiment, a breeder got the following results upon crossing T/t:R/r with a double recessive strain (t/t;r/r): genotype Number of progeny T/t; R/r 98 t/t; r/r 104 T/t; r/r 3 t/t; R/r 5 In addition to these data she noted that the cobs contain only about 50% of the expected kernels. Note that in corn, each kernel is the result of one mating or can be considered one progeny. Hence 50% of the matings are not producing viable offspring. Based on the location of these genes on separate chromosomes what is the expected result? Suggest a hypothesis of a genetic process that could be used to explain the potential karyotype of one of these parents. What are the actual genotypes of the parents?The fur color gene in rabbits has a dominant allele B with a black phenotype and a recessive allele with a brown phenotype. The rabbit hair length gene has a dominant allele S for short hair, and a long hair recessive allele s. In a cross between a homozygous black-long-hair rabbit with a homozygous brown-short rabbit, what would be the genotype(s) B_s_ v and phenotype(s) [ Select ] of the F1 generation? What would be the genotype(s) [ Select ] and phenotype(s) [ Select ] of the F2 generation?In a container/tub, place 50 pieces of red paper, 50 pieces of pink paper, and 50 pieces of white paper. Let us assume that each color is the phenotypic expression of the genotypes homozygous dominant AA (red), heterozygous Aa (pink), and homozygous recessive aa (white). Without looking, randomly pick 20 pieces of paper from your container/tub and assume that those individuals died upon picking, thus will be removed from your population. a. What will happen to your genotypic and allelic frequencies if 10 white individuals leave your gene pool and 10 red individuals immigrated to your gene pool? b. What will happen to your genotypic and allelic frequencies if by accident, all 33 red (AA) individuals were wiped out by a catastrophe?
- A male dog of genotype Aa is crossed with a female dog of genotype AA. Both are large breed, medium breed to recessive result. Determine the genotype and phenotype of the cross.you are a zoologist working with Tigers. Their dominant traits are Bright orange fur(B+), Long tails (L+), and sharp teeth (T+) . You perform the following testcross with an individual with recessive versions of all 3 of the traits. P: B+ L+ T+/B+ L+ T+ x B L T /B L T F1(all identical): B+ L+ T+/ B L T Test Cross Progeny 3435 B L T 3069 B+ L+ T+ 1115 B+ L T 1022 B L+ T+ 426 B L T+ 428 B+ L+ T 114 B L+ T 102 B+ L T+ Total progeny= 9711 question: What is the distance between B and T? Give the answer as map units (mu) with 2 decimal places (ie 12.34)In the previous topic, you learned that Gregor Mendel used Pisum sativum to conceptualize the governing laws of Genetics. In this activity, we will recall how Gregor Mendel utilized the idea of classical breeding to come up with desirable traits. Supposed you have two individual peas. One of the peas is a pure breed with round green seeds while the other has heterozygous round yellow seeds. Supposed a farmer wants to have pure breed peas that have green wrinkled seeds. How are you going to come up with these traits using the two peas that you have? (Note: If the F1 does not include a pure breed green wrinkled seed, you will use the F1 peas for next generation breeding and so on until you have the desired traits. Pure breed means homozygous alleles.) Show the Punnett squares for the cross. You will come up with two or more squares based on how many generations you made.
- A woman who is heterozygous for gene B has brown eyes. B is a dominant allele for brown pigmentation, while b is recessive allele for blue pigmentation. The woman has a patch of blue color in her left eye. Give THREE (3) reasons how this might occur.Match the term with the correct definition or example Product of a cross between true breeding plants that make yellow peas and true breeding plants that make green peas. A description of the alleles present in an individual at one or more loci. Example: MM or Mm or mm. Example: 11q1. 4-q2. 1", meaning it is on the long arm of chromosome 11, somewhere in the range from sub-band 4 of region 1 to sub-band 1 of region 2. Under a microscope, these look exactly the same. The centromere, banding, long arm, short arm, overall length, gene locations, and order of genes are exactly the same. However, nucleotide sequences in genes on the two chromosomes can differ. the unit of heredity, the sequence of nucleotides in the exon regions specifies the sequence of amino acids in a particular polypeptide Brown allele in eye color Red eye in fruit flies Ability to synthesize alcohol dehydrogenase in fruit flies…please make sure to read the question (THERE ARE OTHER VARIATIONS OF THE QUESTION ON DIFFERNT WEBSITES THAT ARE DIFFERENT THAN MINE)
