Which of the following best describes the mechanism behind pleiotropy? A. A single gene controls a single character B. Effect of a gene on metabolic pathways resulting to varied phenotypes C. Effect of multiple genes on multiple pathways D. Effect of multiple alleles on a biochemical pathway >
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- Does this statement is a example of a phenocopy? Explain your reasoning. Q. Human height is influenced by genes at many different loci.What are alleles? A) alternative forms of a genes for a single trait, such as blue eyes or brown eyesB)the location of genes on a chromosomeC) genes for different traits, such as hair color or eye colorA gene has two alleles, E and e. Another gene also has two alleles, T and t. Which of the following correctly shows linkage between the two genes? Group of answer choices ET/et Te/Et Ete/T Ee/tT
- Clubfoot is a common congenital birth defect. This defect is caused by a number of genes but appears to be phenotypically distributed in a noncontinuous fashion. Geneticists use the threshold model to explain the occurrence of this defect. Explain this model. Explain predisposition to the defect in an individual who has a genotypic liability above the threshold versus an individual who has a liability below the threshold.Which statement is false when considering alleles and genes? a) A given gene can have many different possible alleles. b) Alleles are alternative forms or variants of genes. c) Individuals can be homozygous or heterozygous, and this refers to which alleles they have for a particular gene. d) An allele is the same thing as a gene.A farmer wants to breed a variety of taller corn.a) How can the farmer use variation in the height of thecurrent corn plants to produce taller corn plants?b) Will the farmer's work be most effective if height incorn plants is determined by polygenic inheritance,multiple alleles, or co-dominant alleles? Explain.c) The farmer finds that many of the tallest corn plantsare also very susceptible to a particular disease. Howcould the farmer design an experiment to find outif the genes for height are linked to the genes forresistance to the disease?d) If these genes are linked, what steps could the farmertake to create a breed of corn that is taller and moredisease-resistant than the current corn crop?
- Which of the following statements best describe the equation P = G + E + (G X E)?* a. The phenotype is the sum of the genotype and the environment. b. The phenotype of an organism is determined by its genetic traits. c. The phenotype is the total characteristics displayed by an organism that results from the expression of the genes as well as the influence of environmental factors. d. The phenotype is the observable and measurable characteristics of an organism as a result of the interaction of the genes of the organism, environmental factors, and random variation.Which of the following statements is true?a. Not all inheritance patterns follow a strict dominant/recessive relationship.b. Geneticists want to understand both inheritance patterns and theunderlying molecular mechanisms that cause them to happen.c. Different inheritance patterns are explained by a variety ofdifferent molecular mechanisms.d. All of the above are true.Which of the following is the definition of the term named Allele? a.Refers to genes that have identical alleles b.Genetic constitution of an organism c.Alternative form of a gene d.Trait expressed in the F1 generation e.Fundamental physical and functional unit of heredity f.Physical expression of traits of an organism
- a. Each person inherits one copy of the Huntington's Disease gene from each parent. Explain why the negative control sample (from an unaffected individual) only produced one band. b. Explain why the positive control sample (from an individual affected by Huntington’s disease) produced twobands.Which of the following is a characteristic of paramutation? a. One allele is able to alter another allele when both are present in a heterozygote. b. Altered alleles must be passed on to future generations. c. Altered alleles must be capable of altering other alleles in future generations. d. All of the above.Which of the following is the definition of the term named Homozygous? a.Refers to genes that have identical alleles b.Genetic constitution of an organism c.Alternative form of a gene d.Trait expressed in the F1 generation e.Fundamental physical and functional unit of heredity f.Physical expression of traits of an organism