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BIO 111 Exam #2 With Questions And Answers 100% Pass Guaranteed

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BIO 111 Exam #2 With Questions And Answers 100% Pass Guaranteed...

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  • September 19, 2024
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  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • BIO 111
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BIO 111 Exam #2 With Questions And Answers 100%
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What is genetics? -study of heredity and variation of inherited traits



Who is Gregor Mendel? What did he study and establish? -father of modern science of
genetics; studied the inheritance of traits in garden peas and outlined the laws of
Mendelian inheritance



What was the accepted concept of heredity before Mendel? -There were no quantitative
theories of inheritance

-"blending of inheritance" was accepted notion: parents produce offspring w/ traits that
are a blend of the parents' traits



What is a gene? - Answer a segment of DNA, within a chromosome, that contains the
information needed to specify or influence a trait



What does polygenic mean? - Answer several genes may control one trait



What is a chromosome? - Answer a discrete unit of DNA that contains many genes



What is a locus? -Answer physical location of a gene on a chromosome



What do diploids contain? -Answer two copies of each chromosome = two copies of
each gene



What is an allele? -Answer a specific version of a gene

, What do true-breeding organisms always show? -Answer a particular phenotype in
every generation



What is a monohybrid cross? -Answer parents only differed in one trait



What is a dihybrid cross? -Answer parents differ in two traits



What did Mendel cross in his monohybrid P0 generation? -Answer a green, round pea
plant (RR) and a green, wrinkled pea plant (rr)



What was the outcome of the F1 generation of Mendel's monohybrid experiment?
-Answer 100% round pea plants --> round phenotype is dominant over wrinkled -->
Mendel's Law of Dominance



What is the dominant allele? -Answer: the one giving rise to the dominant phenotype, R



What is the recessive allele? -Answer: the one giving rise to the recessive phenotype, r



What happened in the F2 generation of Mendel's monohybrid experiment? -Answer: the
wrinkled phenotype appeared again but in a 3 round:1 wrinkled phenotypic ratio



What did Mendel hypothesis? -Answer particles (genes) were being passed along that
dictated traits observed in offspring (NOT a blend)



What three conditions must be met to have the Mendelian phenotypic ratio to work in a
monohybrid cross? -Answer 1. gametic types are equally likely

2. gametes combine randomly

3. outcome in each square is equally probable



What is the Law of Segregation? -Answer homologs segregate during AI, so alleles must

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