In a plant, green is dominant over white leaf; long is dominant over round shape. a. How many total genotypes are possible in the offsprings of a dihybrid cross? Show the Punnet square. a. Give the phenotypic and genotypic ratios. b. What is the probability of obtaining a plant with white, round shaped leaves? 2. Since eukaryotic chromosomes are assembled with histone proteins, how are replication and transcription carried out? Describe the mechanisms. 3. How are the chromosomes of prokaryotes different from eukaryotes?

In a plant, green is dominant over white leaf; long is dominant over round shape. a. How many total genotypes are possible in the offsprings of a dihybrid cross? Show the Punnet square. a. Give the phenotypic and genotypic ratios. b. What is the probability of obtaining a plant with white, round shaped leaves? 2. Since eukaryotic chromosomes are assembled with histone proteins, how are replication and transcription carried out? Describe the mechanisms. 3. How are the chromosomes of prokaryotes different from eukaryotes?

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter13: Genes, Chromosomes, And Human Genetics

Section: Chapter Questions

Problem 8TYK: Another gene in Drosophila determines wing length. The dominant wild-type allele of this gene...

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a) Are the genes linked? Please explain SPECIFICALLY how you can distinguish between linked and unlinked genes in this instance. b) If the two genes are linked, calculate the % recombination between ser and thr. Show the formula used, as well as all of your calculations. c) Draw a single map illustrating the arrangement of the two genes on the chromosome with respect to each other and to the centromere of the chromosome. Make sure to map ALL three distances.
No need to explain 1.) The phenomenon in which gene present on the same chromosome remain together as gametes are produced is knows as A.) non-disjunction B.) cross-over C.) synapsis D.) linkage 2.) Queen Victoria was a carrier of hemophilia, but there is no record of the disease in any of her ancestors. It is reasonable to suggest that she became a carrier of hemophilia as a result of A.) recombination B.) a mutation C.) inbreeding D.) crossing over 3.) How many primary spermatocytes and primary Oo Yates are required to produced 100 sperm and 100 eggs? A.) 25 primary spermatocytes and 25 primary oocytes B.) 100 primary spermatocytes and 100 primary oocytes C.) 25 primary spermatocytes and 100 primary oocytes D.) 100 primary spermatocytes and 25 primary oocytes
1.a) With the aid of annotated diagrams differentiate between incomplete dominance, complete dominance and codominance b) List and explain the 5 modes of inheritance in pedigree analysis c) With the aid of illustrative diagrams explain the three theories of DNA replication d) Discuss the impact of COVID-19 pandemic on ecosystems.
You breed two monster parents (green, hairless) GGhh and ggHH (white, hairy) to produce F1 offspring (green, hairy). Genes G and H are on the same chromosome. a. What are the dominant phenotypes? b. What are ALL of the potential gamete genotypes that could be created by an F1? Clearly indicate the recombinant genotypes. c. Explain how recombinants are created. d. What are the potential offspring genotypes from the cross of a F1 monster with a homozygous recessive monster. e. From this test cross you get 152 green, hairless; 23 green, hairy; 148 white, hairy, and 27 white, hairless. Calculate the chi squared to test the independent assortment hypothesis and determine if these genes assort independently.
3) A. How are the following proteins involved in cell division: condensing, cohesin, kinetochore complex, tubulin? B. Why does phenotype not always reveal genotype? C. How can Mendel's postulates of segregation and independent assortment be explained by meiosis? D. Explain the genotypic and phenotypic ratios predicted when performing a monohybrid and a dihybrid cross of heterozygotes? E. How can you use the product rule and sum rule to calculate the probability of a particular genotype resulting from crossing parents of specific genotypes?
5. A strain of Neurospora with genotype A B is crossed with a strain with the genotype a b. Half the progeny are A B and half are a b. Explain how this is possible?
1. What is the processes of mitosis and meiosis indicating where the similarities lie and in which aspects they differ. What is the primary reason for each type of cell division by indicating the roles that mitosis and meiosis play in human reproduction and development? 2. Explain what is meant by the term ‘linked genes’ with respect to homologous recombination. For example, if an organism is heterozygous at two genetic loci on the same chromosome, in what way does the position of these alleles with respect to each other affect how they are transmitted to gametes during meiosis?
1) What type of chromosome abnormality does the father have? a)Duplication b)Inversion c)Deletion d)Translocation 2) Why does the father have a normal phenotype? a) Because the translocation was reciprocal. b) Because he has one wild-type copy of each chromosome. c) Because the translocation occurred only in the father's gametes. d) Because no genes are missing.
Another gene in Drosophila determines wing length. The dominant wild-type allele of this gene produces long wings; a recessive allele produces vestigial (short) wings. A female that is true- breeding for red eyes and long wings is mated with a male that has purple eyes and vestigial wings. F1 females are then crossed with purple-eyed, vestigial-winged males. From this second cross, a total of 600 offspring are obtained with the following combinations of traits: 252 with red eyes and long wings 276 with purple eyes and vestigial wings 42 with red eyes and vestigial wings 30 with purple eyes and long wings Are the genes linked, unlinked, or sex-linked? If they are linked, how many map units separate them on the chromosome?
Alleles of genes A and B were analyzed in Neurospora according to the cross shown below. Ordered tetrads are summarized in each horizontal row with the number of tetrads in each category listed alongside. A) Analyze the data to determine the recombination frequency (RF) between A and B, along with any additional information that is available from this data. B) Draw a map of the chromosome or chromosomes with appropriate map distances. C) Use the Perkins formula to reanalyze any relationship between A and B.
1. In humans, curly hair is dominant to straight hair. A woman heterozygous for curly hair marries a man with straight hair and they have children. Show your solutions. a. What is the probability that the first child will have curly hair? b. What is the probability that in a family of four children 3 will be curly and 1 will be straight haired? c. What is the probability that the first three children will be curly-haired girls and the next will be a straight haired boy?
Both the domestic Muscovy duck and the domestic duck (Anas platyrhynchos domesticus) both have a diploid number of 80 chromosomes (2n=80). These two different genera of ducks can mate and produce a mulard. The mulards are bred because of their high meat production. As seen in many interspecific F1 hybrids, mulards are sterile. a. What is the expected chromosome number in the somatic cells of the mulard? b. Explain why the mulard is sterile?