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Part 1: Introduction: Although there is much talk in the news about stem cell research, the public and policymakers need to understand how basic body cells work to transmit information and replicate to facilitate more informed decisions.As a biochemistry teacher, you have been asked to make a presentation on the […]

Q. A haploid strain of Aspergillus nidulans carried an auxotrophic met-8 mutation conferring a requirement for methionine. Several million asexual spores were placed on minimal medium, and two prototrophic colonies grew and were isolated. These prototrophs were crossed sexually with two diverse strains, with the progeny, where met+ means that […]

1) What is DNA? How many chemical bases make up the human DNA code? What bases pair with one another? 2) What is a gene? How many copies of each gene does a human being possess? 3) What is an allele? What is a chromosome? How many pairs of chromosomes […]

From a large scale screen of many plants of Collinsia grandiflora,a plant w/ 3 cotyledons was discovered (normally there are 2cotyledons) This plant was crossed w/ a normal pure-breeding w/wild type plant, and 600 seed from this cross were planted. Therewere 298 plants w/ 2 cotyledons , and 302 w/ […]