BioSci 93- Final Bio93 Key Terms Exam Questions with Revised Correct Detailed Answers with Rationales Guaranteed Pass
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Course
Bio Sci 93-
Institution
Bio Sci 93-
BioSci 93- Final Bio93 Key Terms Exam Questions with Revised Correct Detailed Answers with Rationales Guaranteed Pass
Gene - Answers - A segment of DNA on a chromosome that codes for a specific trait
Allele - Answers - Different forms of a gene
Genotype - Answers - genetic makeup of an org...
BioSci 93- Final Bio93 Key Terms Exam
Questions with Revised Correct Detailed
Answers with Rationales Guaranteed Pass
Gene - Answers -✔✔ A segment of DNA on a chromosome that codes for a specific
trait
Allele - Answers -✔✔ Different forms of a gene
Genotype - Answers -✔✔ genetic makeup of an organism
Phenotype - Answers -✔✔ An organism's physical appearance, or visible traits.
Homozygous - Answers -✔✔ An organism that has two identical alleles for a trait
Heterozygous - Answers -✔✔ An organism that has two different alleles for a trait
Homozygous recessive - Answers -✔✔ Both alleles (factors) for a trait are the same
and recessive (aa)
Homozygous dominant - Answers -✔✔ Both alleles (factors) for a trait are the same
and dominant (AA)
Gamete - Answers -✔✔ sex cell
Test Cross - Answers -✔✔ the crossing of an individual of unknown genotype with a
homozygous recessive individual to determine the unknown genotype
Parental Generation - Answers -✔✔ the adults used in the first experimental cross of a
breeding experiment
F1 Generation - Answers -✔✔ the first generation of offspring obtained from an
experimental cross of two organisms
F2 Generation - Answers -✔✔ offspring of the F1 generation
Dominant allele - Answers -✔✔ An allele whose trait always shows up in the organism
when the allele is present.
recessive allele - Answers -✔✔ An allele that is masked when a dominant allele is
present
, law of segregation - Answers -✔✔ Mendel's law that states that the pairs of
homologous chromosomes separate in meiosis so that only one chromosome from
each pair is present in each gamete
law of independent assortment - Answers -✔✔ the law that states that genes separate
independently of one another in meiosis
true breeding - Answers -✔✔ term used to describe organisms that produce offspring
identical to themselves if allowed to self-pollinate
multiplication rule - Answers -✔✔ To determine the probability, we multiply the
probability of one event by the probability of another.
addition rule - Answers -✔✔ Considering mutually exclusive events, the probability of
both occurring is the sum of the probabilities of each event.
monohybrid cross - Answers -✔✔ A cross between individuals that involves one pair of
contrasting traits
dihybrid cross - Answers -✔✔ A cross between individuals that have different alleles for
the same gene
Incomplete dominance - Answers -✔✔ Situation in which one allele is not completely
dominant over another allele
Codominance - Answers -✔✔ A condition in which neither of two alleles of a gene is
dominant or recessive.
Multiple Alleles - Answers -✔✔ three or more forms of a gene that code for a single
trait
Epistasis - Answers -✔✔ A type of gene interaction in which one gene alters the
phenotypic effects of another gene that is independently inherited.
Melanin - Answers -✔✔ A pigment that gives the skin its color
Melanosome - Answers -✔✔ intercellular vesicle that transfers melanin from
melanocytes into keratinocytes of the epidermis
Melanocyte - Answers -✔✔ cell in the basal layer that gives color to the skin
Pleiotropy - Answers -✔✔ the production by a single gene of two or more apparently
unrelated effects.
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