SexLinkedGenesRecombinationsOctober30th

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Punnett Square for a Dihybrid Cross to Investigate Coat Colour in Mice be Вс BbCc Answer: D Ova BBCC BbCc bc) bb Cc (BC) BbCC D BbCc Bbcc X BBCC bbcc BBcc bbcc Bb Cc BC O Sperm BbCC Bb Cc Bbcc bc BBCC bbcc Вс BbCc Legend Black Brown White Coat colour in mice is controlled by the interaction of two genes. Three phenotypes result: black coat, brown coat, and white coat. The expected phenotypic ratio resulting from a cross between a bbCc female mouse and BbCc male mouse, is black: brown : white Enter only the number values in the order black brown white (Do not include spaces, commas, etc.)

A genetic disorder is caused by a LOF mutation (Bm) and epigenetic imprinting of gene B. Through pedigree analysis of many families, researchers have observed the following results:  Female carrier B+Bm x B+B+ --> B+Bm and    Mother's genotype Father's genotype Children's genotype Children's phenotype Cross 1: B+Bm B+B+ B+Bm , B+B+ some affected, some unaffected Cross 2:  B+B+ B+Bm B+Bm , B+B+ always unaffected Based on these results, gene B is imprinted on the: a. maternal b. paternal

Coat color in mice is influenced by two genes, one for color (A) and one for the amount of pigment production (C). Mice with the wild type agouti coat color have a yellowish to brownish color. Mice also have a gene that determines the amount of pigment the hair produces. Mouse Coat Phenotype and Genotype Correlation  Agouti coat AA, Aa Solid gray/black coat aa Pigment production CC, Cc Albinism cc Multiple crosses were made between male and female mice that were each heterozygous for both traits (AaCc). The data table shows the number of mice of each coat type. Calculate the average F1 generation coat color to answer the question. Coat Color Number of Mice Born in Each Trial Cross Mean Number of Mice 1 2 3 4 5 6 7 8 9 10 Agouti coat 11 8 9 9 10 8 10 7 10 9   Solid gray/black coat 5 2 1 3 4 3 4 3 3 2   Albinism 3 3 6 4 4 3 3 7 4 3   Which…

Sppose a white-furred rabbit breeds with a black-furred rabbit and all the offspring have a phenotype of gray fur. What does the gene for fur color in rabbits appear to be an example of? Explain your answer. 13 A man with AB blood has children with a woman with type B blood. The woman's mother had type o blood. Cross the man and woman to determine the possible offspring. Man Genotype Phenotype Gametes Woman Genotype Phenotype Gametes Mother Genotype Phenotype Gametes Punnett square Personaluse only, do notreproduce garciato187@Studenciacca.edu notieproouce. onal Sudentlacod.edu Genotype ratio: Phenotype ratio: 14 In certain fish, red and blue fish, when mated, create offspring with a patchwork of blue and red scales. Cross a blue fish and a fish with patchwork red/blue scales. Blue Fish Genotype Phenotype student.lacoCd.edu Gametes Patchwork Fish Genotype Phenotype Gametes Punnett square o not reproduce Personal use oniy do garcialo187 studenlacca edu notreproduce Genotype ratio:…

Give the genotype of the offspring of this cross.

You are doing a cross with Drosophila using the following two traits. Curly wings is dominant over straight wings, and round eyes is dominant over elliptical eyes. You cross a female fly that is known to be heterozygous for both genes with a male that is heterozygous for the wing gene but has elliptical eyes. This cross produces 74 flies with curly wings and round eyes, 61 with curly wings and elliptical eyes, 24 with straight wings and round eyes, and 21 with straight wing and elliptical eyes. Calculate the expected phenotype ratios for this cross, then use the chi-square test to see if the observed data are consistent with the expected numbers.

Can you please not type the answer can you write it on a paper

. A three-point testcross was made in corn. The results and a recombination analysis are shown in the display below, which is typical of three-point testcrosses (p = purple leaves, + = green; v = virus-resistant seedlings, + = sensitive; b = brown midriff to seed, + = plain). Study the display, and answer parts a through c.

1) Haemophilia is a serious medical condition where blot clots extremely slowly. A sex linked recessive allele is responsible. Female haemophiliacs are extremely rare. What would be the most likely genotypes of the parents. Explain your reasoning and show the cross.

. In fruit flies (Drosophila melanogaster), the bn+ allele for normal dull red eyes is dominant to the bn allele that gives brown eyes.  Another gene affects wing shape; for this gene, the ct+ allele for normal wings is dominant to the ct allele, which gives “cut” wings, with jagged edges.  A fly with dull red eyes and normal wings was crossed with a fly that had dull red eyes and cut wings, and the following progeny were obtained: 16 dull red eyes, normal wings 14 dull red eyes, cut wings 5 brown eyes, normal wings 5 brown eyes, cut wings What were the genotypes of the parents?

Can you show the cross to know how to get the answers?. And some explanation would be helpful. Please Recombinant

Imagine that you are a new breeder for caique parrots. You can sell normal green feather birds for $500 a bird. The mutation for blue feathers is rare and birds with this color can sell for $3000 a bird. Your goal is to produce as many blue feather offspring as you can, but you don't have the budget to buy blue feather birds as parents. Question: What genotype should you purchase for both parent blrds to get the best chance of getting blue feather offspring? Create and use your Punnett square results as evidence to support your answer. You will need to make multiple Punnett Squares to see which parent genotypes makes the most blue feathered offspring. Keep in mind that Green fealhers (G) is dominant over blue feathers (g), so birds with blue feathers have the genotype gg. Some Punnett squares are provided for you to determine the possible crosses, but remember yoU cannot afford a blue feathered bird, so neither of your parent birds can have the genotype gg. Complete a Punnett Square…

You are a biologist studying the local butterfly population. You've discovered 4 white (albino) butterflies. You mated each one with a wildtype butterfly and kept the lines separately. After several generations of back crosses, you've managed to create 4 lines of white butterflies. How can you tell if they represent mutations in the same gene or different genes? What crosses would you do? What results would you expect? (using complementation analysis).

In rabbits, an allelic series helps determine coat color. The alleles, in order of dominance, are listed below. C=full coat color Cch-chinchilla Ch-himalayan c=white What is the predicted outcome for a CCh rabbit crossed with a Cchc rabbit? Draw out the cross and show the predicted genotypes and phenotypes for the offspring.

In guinea pigs, black hair (B) is dominant to brown hair (b) and short hair (H) is dominant to long hair (h). A black, long-haired male guinea pig (Bbhh) is crossed with a brown, short-haired female guinea pig (bbHh). 1. What is the genotype of the male parent? 2. What is the phenotype of the female parent? 3. What is the genotype of their baby guinea pig (in the empty box)? (male) Bbhh Bh Bh bh bh bH BbHh Bbhh Bbhh Bbhh (female) bh Bbhh Bbhh Bbhh Bbhh bbHh bH BbHh BbHh bbHh bbHh bh Bbhh bbhh bbhh B= Black hair H= long hair h= short hain b= brown hair BhbH - calico long fur - gray wavy fur a b bhbh - brown short hair - BbHh BbHh - black long hair - black short hair O d Bbhh - brown, short-hair- Bbhh O O 0 0

A- Using a Punnett Square show a cross between a homozygous red fox with a homozygous white fox. Let red be dominant. Give the genotype and phenotype for F1 and F2 generations. B- Using a Punnett Square show the cross between a heterozygous gray skunk with a homozygous white skunk. Let gray be dominant. Give the genotype and phenotype for F1.

In guinea pigs, the allele for short hair (S) is dominant. Show the cross for a homozygous short haired guinea pig and a long haired guinea pig. Show all five steps to solving the problem.

A cross is made between a heterozygote, +++/abc, and a recessive homozygote, abc/abc. Analysis of the progeny gave the following results: + + + 450 + + C 10 a + c 70 + b c 210 + b + 65 a + + 200 a bc 460 ab + 15 What is the map distance between the a and c genes? O 25.12 map units O 27.71 map units O 29.39 map units O 32.53 map units O None of the above Next» • Previous PgUp End F10 PrtScn Home 23 F2 DII F3 F4 F5 FB F9 F1 @ %23 %24 1. 3. 4. 8. To W R. Y U S D G H. C M B

You are studying ear shape in dogs (with XY se x determination) and cross a true-breeding pointed-ear female to a true-breeding floppy-ear male and collect all pointy-ear male and female offspring.  Your colleague suspects that the two phenotypes may be caused by alleles of one X-linked gene.  What sort of cross would you do to determine whether this is an X-linked trait? Name it and describe it. What offspring phenotypic ratio would you expect in that cross if the green allele is a dominant X-linked allele? Make sure to label your ratio with all relevant phenotypes. How would the result of your cross (from A) be different if the trait is autosomal

Thimble foxes cook color is controlled by a single gene while tail length is controlled by a separate Gene. Red coat is dominant to white coat and long tails are dominant to short tails, dominant is complete. Thimble fox one has a red coat and a long tail, its mother had a white coat and short tail. Thimble fox two has a white coat and long tail, its father had a short tail.  Complete the punnets square for this cross and give the phenotypic ratio of the offspring. If there is a dominant allele for this first Street, place the gamete in the first give me a position. Then state the Phenotypic ratio.

A woman has her personal genome analyzed for the BRCA1 mutation after learning that her father is heterozygous and carries one mutant allele. What is her chance of inheriting the mutant allele from her father? 0: men cannot transmit genes affecting breast cancer. 25% 50% 75% 100% Among the progeny of a heterozygous round (Aa) x homozygous wrinkled ( aa) cross, three seeds are chosen at random. What is the probability that all three seeds are round? (1/4)3 1/4 (1/2) 3 1/2 A single gene can produce different proteins. True False

In crosses between mutant mice, you find the following patterns in the genotype for the A locus containing alleles A1, A2, A3 and A4: What would be the best explanation for the inheritance and why?

Calculate the map distances among the genes.

You are working with a dog breeder to produce a litter of puppies from their dogs. Of particular interest to this breeder is the texture of the coat and the presence of spots. The texture of the coat is controlled by one gene (R = rough coat, r = smooth coat), and the presence of spots is controlled by a separate gene (S = spots, s = solid coat). The breeder decides to perform the following cross: RrSs x rrSs What percentage of the offspring would you expect to have the following phenotypes: Rough and spotted: Incorrect answer: 56.25% Rough and solid: Incorrect answer: 18.75% Smooth and spotted: Incorrect answer: 18.75% Smooth and solid: Incorrect answer: 6.25%

Purple flowers are dominant to white flowers. Identify the phenotypefor the following genotype Ff, FF, ff and determine if the genotype is heterozygous or homozygous. * For each row, you should select two columns. Purple flowers White flowers Heterozygous Homozygous Ff FF ff Brown eyes are dominant to blue eyes. Identify the phenotype for the following genotype BB, Bb, bb and determine if the genotype is heterozygous or homozygous. * 口 ロ口

Color blindness is a X-linked trait in human.  A cross was done and F1 showed half of the female and half of the male as normal-color vision while the other half of the female and male were color blind. What were the genotypes of the parents? Show the cross  and the offspring.

n corn, male sterility is controlled by maternal cytoplasmic elements. This phenotype renders the male part of the corn plants (i.e the tassel) unable to produce fertile pollen; the female parts, however, remain receptive to pollination by pollen from male fertile corn plants. However, the presence of a nuclear fertility restorer gene F restores fertility to male sterile lines sing the cardboard chips, simulate the crosses indicated below. Give the genotypes and phenotypes of the offsprings in each cross, and properly label the nucleus and the cytoplasm of each individual in the cross Legend male sterile cytoplasm Male fertile cytoplasm FF nucleus Ff nucleus ff nucleus A. Male sterile female x FF male Explain the phenotype of the offspring B. Male sterile female x Ff male Explain the phenotype of the offspring

Continuing his experiments, in Miles Morales' genome, the Goblin found similar genes, including one for invisibility which also seems to be dominant. To determine if they were linked to agility, the Goblin set up another cross and got the following results: Phenotype Agility and Invisibility Agility Invisibility No Powers Number of Progeny 121 52 55 125 What is the chi-square value for this?

SET 2: In corn, the following allelic pairs have been identified in chromosome 3: +/b plant color booster vs. non-booster +/lg with ligule vs. without ligule +/v green plant vs. virescent A test cross between triple recessive plants and plants heterozygous for the three pairs gave the following progeny: + v lg 305 b + lg b v lg + + lg b v + 148 58 + + + 62 + y + 152 b + + 275 Total 1000 Calculate the parental and recombinant frequencies, the map distances between genes, and the coefficient of coincidence. Illustrate the gene map or sequence.