A plant with purple flowers is crossed with a plant with white flowers, and the F1 are self-fertilized to produce 105 F2 progeny with purple flowers and 45 with white flowers.

A scientist hypothesized that there are two genes with identical functions that control the dominant trait. The scientist also proposed that the two genes are not linked. The scientist carried out a chi-square test to test the hypothesis. Which one of the following options is the correct chi-square value obtained by the scientist?

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#Question id: 15186

#Unit 13. Methods in Biology

Electrophoretic resolution is achieved by adjusting

A. Current

B. Buffer concentration

C. Chemical nature of Buffer

D. Concentration of supporting media

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#Question id: 15187

#Unit 13. Methods in Biology

Highest electrophoretic resolution/sensitivity is achieved from

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#Question id: 15188

#Unit 13. Methods in Biology

Electrophoretic mobility and Electroendosmostic force combinedly functions in

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#Question id: 15189

#Unit 4. Cell Communication and Cell Signaling

Which of the following  cells control the differentiation of HSCs (hematopoietic stem cells )?

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#Question id: 15190

#Unit 8. Inheritance Biology

The recessive mutant allele that causes cystic fibrosis is much more frequent in Caucasians population than in other world populations. Some scientists believe heterozygotes must have had a survival advantage during plagues such as cholera that occasionally swept through this population. What concept does this illustrate?

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#Question id: 15191

#Unit 8. Inheritance Biology

Genes that control coat color in mammals represent some of the best early examples of genes with multiple alleles exhibiting different phenotypes. A classic example is the C gene in hamsters. Three of the known alleles of this gene are C, c^k and c^a. Each supplies a different amount of black pigment to the coat hair. The phenotypes of three different homozygous strains are as follows.

Based on the concepts of dominance, determine whether ck and ca were dominant or recessive alleles by crossing the true-breeding sepia hamsters to true-breeding black hamsters. From the resulting F1 progeny phenotype, what would be the ratio of F2 phenotype