BIOL 180 MIDTERM EXAM
Which of the following is the correct definition of haploid number? -
ANSWERS-The number of different types of chromosomes present.
Which of the following is the correct definition of ploidy? -
ANSWERS-The number of each type of chromosome present.
What does it mean to say that "homologs synapse?" - ANSWERS-
Pairs of homologous chromosomes physically come together.
What is cytokinesis? - ANSWERS-Cell division (usually follows
mitosis and meiosis)
The chromosome theory of inheritance is based on the claim that
genes are found on chromosomes. If you were going to build a
physical model of a chromosome from everyday materials to
demonstrate meiosis (including crossing over), which of the following
would work best? - ANSWERS-strings of pop beads (each bead is a
gene)
What is a genetic locus? - ANSWERS-A particular position on a
chromosome.
What's the pattern component of the chromosome theory of
inheritance? - ANSWERS-Mendel's rules: the principle of segregation
, and the principle of independent assortment, because genes are found
on chromosomes.
What's the process component of the chromosome theory of
inheritance? - ANSWERS-The behavior of chromosomes during
meiosis I.
What is sex-linkage, X-linkage, and Y-linkage? - ANSWERS-X-
linked alleles are on the X chromosome; Y-linked alleles are on the Y
chromosome; both are sex-linked.
What is an autosomal trait? - ANSWERS-A trait associated with a
gene on a non-sex chromosome.
X and Y chromosomes follow the principle of segregation. What does
this mean? - ANSWERS-If an individual is XY, then each gamete gets
one X or one Y.
In this class and other classes at the U, you'll write X-linked alleles as
X^R and X^r. If you're keeping track of more than one X-linked allele
at a time, you'd write the chromosomes as X^RB and X^rb (or
whatever the genotype actually is for the Rand B genes). Suppose a
male carries an X chromosome with the R allele and the b allele. How
would you write his genotype? - ANSWERS-X^Rb Y
Why don't alleles from linked genes assort independently, if no
crossing over occurs? - ANSWERS-They are transmitted together (on
Which of the following is the correct definition of haploid number? -
ANSWERS-The number of different types of chromosomes present.
Which of the following is the correct definition of ploidy? -
ANSWERS-The number of each type of chromosome present.
What does it mean to say that "homologs synapse?" - ANSWERS-
Pairs of homologous chromosomes physically come together.
What is cytokinesis? - ANSWERS-Cell division (usually follows
mitosis and meiosis)
The chromosome theory of inheritance is based on the claim that
genes are found on chromosomes. If you were going to build a
physical model of a chromosome from everyday materials to
demonstrate meiosis (including crossing over), which of the following
would work best? - ANSWERS-strings of pop beads (each bead is a
gene)
What is a genetic locus? - ANSWERS-A particular position on a
chromosome.
What's the pattern component of the chromosome theory of
inheritance? - ANSWERS-Mendel's rules: the principle of segregation
, and the principle of independent assortment, because genes are found
on chromosomes.
What's the process component of the chromosome theory of
inheritance? - ANSWERS-The behavior of chromosomes during
meiosis I.
What is sex-linkage, X-linkage, and Y-linkage? - ANSWERS-X-
linked alleles are on the X chromosome; Y-linked alleles are on the Y
chromosome; both are sex-linked.
What is an autosomal trait? - ANSWERS-A trait associated with a
gene on a non-sex chromosome.
X and Y chromosomes follow the principle of segregation. What does
this mean? - ANSWERS-If an individual is XY, then each gamete gets
one X or one Y.
In this class and other classes at the U, you'll write X-linked alleles as
X^R and X^r. If you're keeping track of more than one X-linked allele
at a time, you'd write the chromosomes as X^RB and X^rb (or
whatever the genotype actually is for the Rand B genes). Suppose a
male carries an X chromosome with the R allele and the b allele. How
would you write his genotype? - ANSWERS-X^Rb Y
Why don't alleles from linked genes assort independently, if no
crossing over occurs? - ANSWERS-They are transmitted together (on
