Please correct the mistakes if it exists I DuSe 43. The tiger moth has three phe

Question

Please correct the mistakes if it exists

I DuSe 43. The tiger moth has three phenotypes for the wing coloration gene;, homozygous dominant individusls have white homozygous recessive individuals have black spots and heterozygous individuals have both black spots and white spots Therefore, wing coloration in the tiger moth is an example of A. a pleiotropic trait B. a polygenic trait 44. Sympatric speciation occurs when two groups of organisms become reproductively isolated due to Nichehabitat specialization B. Geographic isolation C. Directional selection D. Convergent evolution 45. What is the most accurate description for a zecessive allele? Always the most common allele in a population ? Expressed in the phenotype only when the genotype is homozygous recessive C. Expressed in the phenotype no matter what the genotype is D. Expressed in the phenotype when the genotype is heterozygous A. 46. Suppose you were to breed pea plants until you produced two true-breeding strains. One strain always produced yellow seeds and the other strain always produced green seeds. If you then cross-bred the strains, what would the genotype be of the first generation o A mixture of genotypes B) All heterozygous All homozygous dominant D. All homozygous recessive 47. Which of following identifics the stages of mammalian reproductive development in chronological order? A. Blastocyst Gastrulation ZygoteOrganogenesis B Zygote BlastocystGastrulation Organogenesis C. Gastrulation ? Blastocyst ? Zygote ? Organogenesis D. ZygoteGastrulationBlastocyst Organogenesis 48. Which types of cells are MOST likely to support normal development in nclear transplant experiments? A. endoderm B. ectoderm blastocyst E. bone maow 49. If genetically different strains of corn were grown in a greenhouse under identical environmental conditions, what would you conclude about differences in height among individuai plants? A. Differences in height have 0% heritability Differences in height have 100% heritability Differences in height are due to genetic and environmental differences D. Impossible to make a conclusion about the differences in height 50. To understand the genetic vs. environmental influences over particular traits/diseases, scientists measure concordance in identical and fraternal twins. What is the best definition for concordance? A. Percentage of twins who show the trait when neither of the parents show the trait Percentage of cases in which both members of a pair of twins show the trait when it is known that at least onc member shows it Percentagc of twins who are a carrier for the trait but do not show it in the phenotype Percentage of twins who have the trait C. D.

Explanation / Answer

43. Codominance. In this, both the alleles are expressed and the phenotype is not an intermittent one between the recessive n dominant.

44. A. Habitat specialization. Sympatric speciation occurs when reproductive isolation occurs within a population without geographic isolation. It occurs when within a population, the habitat gets specialised.

45. B. Is correct. Recessive is expressed when genotype is homozygous recessive.

46. B.. all heterozygous.

47. B is correct. Zygote formation os followed by blstula formation which is followed by gastrulation and then by organ formation.

48. D blastocyst. Stem cells are also harvested from blastocyst. Pluripotent these cells.

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