Q.No.1. Can you always ascertain an organism’s genotype for a particular locus if you know its phenotype? Conversely, if you are given an organism’s genotype for a locus, can you always reliably predict its phenotype? Explain.
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Q.No.1. Can you always ascertain an organism’s genotype for a particular locus if you know its
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- Please help with the following: How does penetrance differ from expressivity in genetics? A. Penetrance is the percentage of individuals with a specific genotype that exhibit the expected phenotype while expressivity is the degree to which a phenotypic character is expressed. B. Penetrance is the degree of lethality of a specific genotype while expressivity is how frequently that genotype is seen in the population. C. Penetrance is the presence of more than two alleles at a locus within a group of individuals while expressivity is the influence of sex on which alleles express themselves. D. None of the above. E. Penetrance refers to the paternal effects of a gene while expressivity refers to the maternal effects of a gene.Briefly describe the polygenic threshold theory. How polygenic traits can be genetically determined? What are major factors affecting gene frequencies? How the Hardy-Weinberg relationship can be used in genetic counseling? Is it useful for genetic risk prediction?Why is it more efficient to perform a test cross with a homozygous recessive donor than a homozygous dominant donor? How could the same information still he found with a homozygous dominant donor?
- Identify a possible advantage and a possible disadvantage of a genetic test that would identify genes in individuals that increase their probability of having Alzheimer’s disease later in life.For each of the following genetic topics, indicate whether it focuses on transmission genetics, molecular genetics, or population genetics. a. Analysis of pedigrees to determine the probability of someone inheriting a traitb. Study of people on a small island to determine why a genetic form of asthma is prevalent on the islandc. Effect of nonrandom mating on the distribution of genotypes among a group of animals d. Examination of the nucleotide sequences found at the ends of chromosomese. Mechanisms that ensure a high degree of accuracy in DNA replicationf. Study of how the inheritance of traits encoded by genes on sex chromosomes (sex-linked traits) differs from the inheritance of traits encoded by genes on nonsex chromosomes (autosomal traits)1. Having black hair is represented by the following alleles: A, B, and C. Which of the following genotypes represent the alleles of having brown hair? CHOICES: A. aabbcc B. AaBbcc C. AAbbcc D. AABBCC 2. Two parents have normal vision, but their son is born colorblind.What must be the mother's genotype using XB for normal and Xb for color-blindvision? CHOICES: B. XBXB C. XBXb D. XbXb A. XX 3. The colorblind son grows up and marries a woman with normal vision. She does not carry the colorblind allele. Their genotypes are XbYb and XBXB,respectively. By using the Punnett square solve for the percentage of the phenotype. What is the percentage that their first child will be colorblind? CHOICES: A.0% B. 25% C. 50% D. 75% 4. Which of the following traits is NOT controlled by multiple genes? CHOICES: A.colorblindness C. freckles B.eye color D. hair texture
- 1. Why are mathematical /statistical tools needed in the understanding of the transmission of traits in the field of Genetics?While studying the genetics of the "Cute Faced Bat" face structure gene, three alleles ) are identified that produce 6 genotypes and 4 phenotypes “Cute”, “Super Cute Nose”, “Super Cute Face”, and “Super, Duper Cute” (equally expressing both Super Cute Face and Super Cute Nose). Given these observations, what can you conclude about the allele interactions?The role of the TPMT genotype in response to treatment emphasizes the importance of pharmacogenomics. What changes in treatment would be recommended for someone homozygous recessive for TPMT, compared to someone that is homozygous dominant?