Question number 3 3. Counting Barr BodiesHow many Barr Bodies would be present in cells of individuals with the following genotypes?XXe. XXYb. XYf. XXXXYc. XOd. XXXa.PART B: Problems - Use Punnett Squares for all crossesxH = normal dominant alleleXh= recessive allele (hemophilia)Y = Y chromosomeg. XXXXXh. XXXYYpe for a woman who is a carrier of hemophilia and a normal man.

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Description: Question number 3 3. Counting Barr BodiesHow many Barr Bodies would be present in cells of individuals with the following genotypes?XXe. XXYb. XYf. XXXXYc. XOd. XXXa.PART B: Problems - Use Punnett Squares for all crossesxH = normal dominant alleleXh=

Barr bodies are X chromosomes that are inactive in female mammalian cells. Barr bodies are named…

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3. Counting Barr Bodies How many Barr Bodies would be present in cells of individuals with the following genotypes? a. XX e. XXY b. XY f. XXXXY хо d. XXX C. g. XXXXX h. XXXYY

Biology: The Unity and Diversity of Life (MindTap Course List)

15th Edition

ISBN:9781337408332

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter14: Chromosomes And Human Inheritance

Section: Chapter Questions

Problem 6SQ: Choose the statement that is incorrect. a. A son can inherit a recessive allele on an X chromosome...

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2. A heterozygous (+/c) for curved wings is crossed to another heterozygous (+/c) for curved wings. Complete the F1 AND F2 generations. Express the genotypes and phenotypes for each generation. F1: +C +C +C F2: ++ +C +C P1= ++ X cc P2= ++ X cc Genotypes: Genotypes: Phenotypes: Phenotypes:
9. In fruit flies, eye color is carried on the X chromosome. The allele for red eyes is dominant over its recessive allele, white eyes. Cross a homozygous, red-eyed female to white-eyed male. white cefes red eyes What is the genotype of the male? What is the genotype of the female? X xxx xx Y XY XY Genotypes x' x X Y How many genotypes are possible among the offspring? How many phenotypes are possible among the offspring? What is the probability of getting offspring that are red-eyed males? What is the probability of getting offspring that are white-eyed males? What is the probability of getting offspring that are red-eyed females? What is the probability of getting offspring that are white-eyed females? Phenotypes red eyes white eyes
2. What are the genotypes (in symbols) of the individuals you crossed to obtain F,? ..F,? F;: Male parent: XbTY Female parent: X8tXBt F2: Male parent: XBtY Female parent: X8TXbt Bristles: X® - morula, Xb - hook Tarsi: X" - wild type, X' - jointed 3. Differentiate between autosomal genetic linkage and sex linkage. Criteria Autosomal Genetic Sex Linkage Linkage
5. A woman with type AB blood marries a man with type homozygous type B blood. What are the phenotype and genotype ratios of the offspring? 6. Hemophilia is a sex linked recessive trait. If a carrier woman marries a normal man. The couple gives birth to a boy. What are the chances that this child will have hemophilia? Make sure use XX or XY here) 7. The height of a certain plant is a result of polygenic inheritance involving two pairs of genes. Draw a Punnett square to show the result of a cross between a tall (AABB) plant and a short (aabbi. What is the phenotype ratio? 8. What is a mutation? 9. What is sickle cell anemia? 10. What is hemophilia? 11. What is a pedigree? 12. Draw a pedigree to represent the following. Shaded symbols should represent individuals with hemophilia: A man with hemophilia marries a normal woman. They have 3 children, two normal boys and a girl who is a carrier. The girl marries a normal man and they have two boys and two girls. One of the girls is a carrier…
2. For each genotype, identify whether it is haploid or diploid. Haploid or diploid? Ss Haploid or diploid? WW Ww rr Ww Tt W Ts wH 3. For each genotype, identify whether it is homozygous dominant (HD), heterozygous (Ht) or homozygous recessive (Hr). HD, Ht or Hr? HD, Ht or Hr? Ss WW GG Pp XHXh rr X:X: LL
4. Cross a Male with hemophilia with a normal heterozygous female. What is the percentage of the genotype and phenotype of the offspring? What type of punnett square will you be using for this cross? Parents: Genotypes: P1 x P2 einen Offspring: Genotype: Phenotype:
10. In the video example, the sex-linked disorder was a recessive trait. However, sex-linked disorders can be dominant! (Conduct a search to see some of the sex-linked dominant disorders that exist). Sex- linked dominant disorders will show even if there is only one dominant allele present. Using the allele D to stand for a dominant sex-linked trait, show a cross with a woman who does not have a dominant sex-linked disorder (X*Xª) with a man that does. Will the disorder in this particular cross be more common in daughters or sons?
2. Cross a Brown and White Spotted Cow with a White Cow. What is the percentage of the genotype and phenotype of the offspring? What type of punnett square will you be using for this cross? Codomnent BB WW Parents: Genotypes: P1 x P2 Offspring: Genotype: Phenotype:
Part 2. Do one more example of a monohybrid cross. This time assign the letter "B" for onion taste. Being sweet is dominant controlled by allele (B) and being bitter is recessive-controlled by allele (b). Cross individuals who are both heterozygous for this trait. 5. What is the genotype of each of these heterozygous individuals? 6. What is the phenotype of these heterozygous individuals? Complete the Punnett square below using the alleles you just listed. 7. What are the resulting genotypes and their ratios or %? 8. What are the resulting phenotypes and their ratios or %? Figure 3. Monohybrid Cross for Onion Taste. 103
10. What phenotypes are expected and in what proportion from each of the following n crosses? (Assume D, G and Ware dominant over d, g and w, respectively.) 31 (a) DdGGww x DDGgWw how bon (b) ddggWw x DdGgww HD: (c) DdGgWw x DdggWw (d) DdGgWW x DdGgWW baildhalos 6 am bunjid-roloos (d) nomow sof bemam nam lemona (0) namnow beild-oloss of bemem nem tarono [b) int euogyson M 11. Radishes can be long, round or oval in shape. They may be red, white or purple in color. A long red variety was crossed with a round white variety. In the F₁ generation, all were oval purple. In the F2 generation, there were 8 long red, 15 long purple, 17 oval red, 31 oval purple, 7 long white, 15 oval white, 8 round red, 16 round purple and 9 round white. Explain the genetic basis of these results. hot tmsidorss endohes barlastis bed terftet ben hemouth bra (Jisi edohss srillo sonsmedni Snem ar to gaylonog ori ai fer msil) ov fa cisiv lemon diw be (!) 12. In shorthorn cattle, the allele for red coat color (R) is…
3. What is the genotypic ratio of the testcross shown in Figure 4? 4. Give the phenotypic and genotypic ratio of the following testcrosses of dihybrids: Cross A Cross B P ΥY RR yy rr P YY Rr yy rr F1 F, YR Yy Rr YR Үy Rr (Y Yy rr Cross C Cross D P. Yy RR yy rr P Yy Rr yy rr F, F, (yr Y R Yy Rr Y R Yy Rr y R yy Rr Yy rr (y R yy Rr yy rr
II Pause The diagram below is a pedigree showing the inheritance pattern of a disease in a family. II Legend affected female unaffected female affected male unaffected male What is the probability that one of the daughter's children will have the disease if she has children with a male who is an unaffected carrier of the gene? O A. 0% O B. 100% O C. 75% O D. 50%