BSC 170 Exam 1 UPDATED Exam
Questions and CORRECT Answers
Modes of Inheritance - CORRECT ANSWER - -The pattern in which a gene variant
passes from generation to generation.
-Can be dominant/recessive, autosomal, or X- or Y-linked
Autosomal Dominant - CORRECT ANSWER - the disease affects BOTH sexes and
appears in EVERY generation
Autosomal Recessive - CORRECT ANSWER - the disease affects both sexes and can
"skip" generations through carriers
*Carriers do not have symptoms.
Complete Dominance - CORRECT ANSWER - masks affect of recessive gene
Incomplete Dominance - CORRECT ANSWER - intermediate phenotype half way
between 2 parents
Ex) red flower x white flower = pink flower
Codominance - CORRECT ANSWER - both genes express slightly different, but not
exclusive traits
Ex) red x white flower = white and red marbled flower
Recessive - CORRECT ANSWER - the masked trait
Monohybrid Cross - CORRECT ANSWER - A cross of 2 individuals who are
heterozygous (ex. Tt) for a single trait.
, *follows one trait
*self-crossed plants are hybrids
Law of Segregation - CORRECT ANSWER - The distribution of alleles of a gene into
separate gametes during meiosis.
genes - CORRECT ANSWER - Greek for "give birth to"
Diploid - CORRECT ANSWER - -the genetic condition of having pairs of homologous
chromosomes
-most cells are diploid
-2n (n = # of homologous pairs)
Haploid - CORRECT ANSWER - -the genetic condition of only one copy of each
chromosome
-no homologous pairs
-1n
-in humans n=23
Apoptosis - CORRECT ANSWER - a form of cell death
cell cycle - CORRECT ANSWER - describes the sequence of activities as a cell prepares
for and undergoes division
2 major stages of the cell cycle: - CORRECT ANSWER - -interphase (not dividing)
-mitosis (dividing)
Questions and CORRECT Answers
Modes of Inheritance - CORRECT ANSWER - -The pattern in which a gene variant
passes from generation to generation.
-Can be dominant/recessive, autosomal, or X- or Y-linked
Autosomal Dominant - CORRECT ANSWER - the disease affects BOTH sexes and
appears in EVERY generation
Autosomal Recessive - CORRECT ANSWER - the disease affects both sexes and can
"skip" generations through carriers
*Carriers do not have symptoms.
Complete Dominance - CORRECT ANSWER - masks affect of recessive gene
Incomplete Dominance - CORRECT ANSWER - intermediate phenotype half way
between 2 parents
Ex) red flower x white flower = pink flower
Codominance - CORRECT ANSWER - both genes express slightly different, but not
exclusive traits
Ex) red x white flower = white and red marbled flower
Recessive - CORRECT ANSWER - the masked trait
Monohybrid Cross - CORRECT ANSWER - A cross of 2 individuals who are
heterozygous (ex. Tt) for a single trait.
, *follows one trait
*self-crossed plants are hybrids
Law of Segregation - CORRECT ANSWER - The distribution of alleles of a gene into
separate gametes during meiosis.
genes - CORRECT ANSWER - Greek for "give birth to"
Diploid - CORRECT ANSWER - -the genetic condition of having pairs of homologous
chromosomes
-most cells are diploid
-2n (n = # of homologous pairs)
Haploid - CORRECT ANSWER - -the genetic condition of only one copy of each
chromosome
-no homologous pairs
-1n
-in humans n=23
Apoptosis - CORRECT ANSWER - a form of cell death
cell cycle - CORRECT ANSWER - describes the sequence of activities as a cell prepares
for and undergoes division
2 major stages of the cell cycle: - CORRECT ANSWER - -interphase (not dividing)
-mitosis (dividing)
