An eye disorder is common on a particular island. If 4.5% of people have both the copies of the recessive allele while 3.9% will have one copy. Find the freq. of the allele that is dominant in this situation.
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An eye disorder is common on a particular island. If 4.5% of people have both the copies of the recessive allele while 3.9% will have one copy. Find the freq. of the allele that is dominant in this situation.
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- The white spotting is caused by the S gene (“S” stands for spotting), which has 2 alleles: big S (spotting) and little s (no spotting). The big S allele is dominant, so if there is at least one S allele (SS or Ss), the cat will have white spots. Calix has white spots, so he definitely has at least one big S allele. The rest of the fur color is controlled by the O gene that also has 2 alleles: big O (orange fur) and little o (black fur). The O gene is on the X chromosome. Males only have one X chromosome, so they can only have one allele for the O gene. They can either be orange (O) or black (o). Females have two X chromosomes, so they can have two alleles for the O gene. If they have two O alleles (OO), they are orange. If they have two o alleles (oo), they are black. If they have one of each allele (Oo), they have both orange and black fur. female: XX male:XY Which of the following fur colors are possible in males? Choose all that apply. Remember that the S gene for white spots is…Most of people in America are unable to taste phenylthiocarbamide (PTC). Sense of trait is governed by dominant allele while recessive condition leads to tasteless. Albinism is also a single locus trait with normal pigment being dominant and the lack of pigment being recessive. A normally pigmented woman who cannot taste PTC has a father who is an albino taster. She marries a homozygous, normally pigmented man who is a taster but who has a mother that does not taste PTC. What are the genotypes of the possible children?Rehpogs are mythical creatures. They are small and not very smart. Rehpogs live on the ground in a flat, warm habitat. Their fur texture and color ranges from thick purple fur to thin pink fur, depending on allele distribution. The dominant fur allele (R) codes for thick purple fur. The recessive allele (r) codes for thin pink fur. REMEMBER: a phenotype (fur color) is the physical expression of a genotype (two- letter code for the alleles present in that individual). Each individual has two alleles for fur color: $ RR genotype is homozygous dominant = Thick purple fur phenotype Rr genotype is heterozygous = Thick purple fur (because of the presence of one dominant allele) XX genotype is homozygous recessive = Thin pink fur (because of the absence of a dominant allele) For the purposes of this experiment, Rehpogs mate once per year and produce two offspring each year. Rehpogs are monogamous, faithful and fertile. dictions: On Part I A small population of genetically diverse Rehpogs…
- r ודr ו-r ורז A trait that can cover another: BLACK FUR over White Fur. Upper Case Letter represents the Alleles. Phenotype A trait that can be covered: WHITE FUR can be covered by black fur. Lower Case Letters represents the Allele. Genotype Letters that represent the actual genes: Bb, BB, bb Dominate Physical Trait such as Black Fur or White Fur. RecessiveIn humans, there is a gene that influences the ability to smell the thioesters present in urine after asparagus is eaten. The ability to smell these compounds is an autosomal dominant trait. A is dominant and confers the ability to smell these thioesters a is recessive and does NOT confer the ability to smell these thioesters p = freq (A) = frequency of allele A in the population = number of A alleles/ total number of alleles %3D q = freq (a) = frequency of allele a in the population where p + q = 1 and, therefore, p? + 2pq + q? = 1 and %3D %D p? = freq (AA) = frequency of genotype AA = number of AA individuals/ total number of individuals %3D 2pq = freq (Aa) = frequency of genotype Aa q? = freq (aa) = frequency of genotype aa Phenotype Number of People Able to smell thioesters 378 Unable to smell thioesters 1323 Total 1701 1. Calculate p and q for this population. 2. Calculate p?, 2pq, and q? for this population.As you have read, if an allele is paired with another one just like it, the name for the pair is homozygous. If the allele is paired with a different type, the pair is called heterozygous. You have also learned about how some alleles are domi- nant and some are recessive. A Punnett square shows how the pairs will possi- bly match up. Making a prediction about how the offspring will look is usually simple. If the pair is heterozygous or homozygous dominant, the dominant trait will be expressed. If the pair is homozygous recessive, the recessive trait will be expressed. There are some alleles, however, that behave like normal dominant alleles when in a heterozygous pair, but are deadly in a homozygous pair. For example, the alleles that control fur color in wild mice are yellow and black. The yellow allele is dominant (Y) and the black is recessive (b). When a mating occurs and the alleles are paired together, the hairs have yellow and black bands. From a distance this makes the mouse…
- Cystic fibrosis is a homozygous recessive condition that affects 1 in 10,000 of the Hispanic populationin the United States. Calculate the frequency of the dominant allele, the frequency of the recessiveallele, and the percentage of heterozygous individuals (carriers) in the Hispanic population.Frequency of thedominant alleleFrequency of therecessive allele% homozygous dominant% homozygous recessive% heterozygousThe cystic fibrosis allele is recessive. The frequency of cystic fibrosis is 0.000484, or about one in 2000 people. Calculate the allele frequencies. What portion of people are carriers (heterozygotes) for cystic fibrosis?A. This is a Gruffalo (Donaldson, J, 1999, Puffin Books). It is a terrifying looking animal who is the biggest, baddest creature in the whole dark wood. Other animals are very afraid of it, as it is a top predator. Gruffalos release lots of olfactory chemicals marking them as predators that are smelled by other animals, and these chemicals vary from gruffalo to gruffalo depending on their genotypes (specific genes and related alleles are not known, just know that gruffalos vary for genetic reasons). There is variation in the olfactory chemicals released when gruffalos are in different types of forests (i.e. not just deep darks woods), where some gruffalos increase their olfactory chemicals, and some decrease. Draw the associated reaction norms for 4 genotypes of gruffalo in two different forest environments, and name the mechanism acting here Additionally, all gruffalos are tricked by little brown mice, where gruffalos think they are prey animals when in the presence of little brown…
- Black is the dominant for color for rabbits and white is the recessive. B stands for the black allele and b represents the white allele. A white rabbit would have a genotype of bb and a black rabbit would have a genotype of BB or Bb.Heterozygote advantage is an interesting condition in those individuals who have one of each allele (dominant and recessive) have a higher survival rate than those individuals who are either homozygous dominant or homozygous recessive. Sickle-cell anemia is such a genetic disease associated with the recessive allele. Normal homozygous individuals (SS) have normal blood cells that are easily infected with the malarial parasite. Thus, many of these individuals become very ill from the parasite and many die. Individuals homozygous for the sickle-cell trait (ss) have red blood cells that readily collapse when deoxygenated. Although malaria cannot grow in these red blood cells, individuals often die because of the genetic defect. However, individuals with the heterozygous condition (Ss) have some sickling of red blood cells, but generally not enough to cause mortality. In addition, malaria cannot survive well within these "partially defective" red blood cells. Thus, heterozygotes tend to…The frequency of a recessive disease is 9%. What is the frequency of the allele that causes the disease? What is the frequency of the dominant allele? What is the frequency of the carriers (heterozygotes) of the disease?