Which of these is not a stage of the cell cycle?
interphase
cytokinesis
mitosis
photosynthesis
The method by which a cell’s cytoplasm divides is called ________.
DNA replication
interphase
mitosis
cytokinesis
What are the structures labeled A in the drawing?
chromatid
centrioles
spindle fiber
centromere
During which phase of mitosis are sister chromatids pulled to opposite ends of the cell?
anaphase
telophase
prophase
metaphase
Meiosis results in cells that are ____.
diploid
haploid
tetraploid
polyploidy
Homologous chromosomes are:
Identical copies of a chromosome
Chromosomes from different species
The chromosomes that make up the pairs
Found only in gametes
Crossing over between homologous chromosomes occurs in ____.
Anaphase II
Telophase II
Prophase Ⅰ
Metaphase II
Homologous chromosomes separate during which phase(s) of meiosis?
interphase
anaphase Ⅰ
telophase Ⅰ
interphase and telophase Ⅰ
DNA replication takes place ______ during meiosis.
once
twice
four times
six times
During which stage of sex cell formation does the number of chromosomes decrease from diploid (2n) to haploid (n)?
Prophase Ⅰ
Anaphase Ⅰ
Prophase II
Anaphase II
A (an) ______ is an alternative form of a single gene passed from generation to generation.
hybrid
phenotype
allele
zygote
The observable expression of an allele pair is called a ____.
recessive gene
genotype
monohybrid cross
phenotype
An organism with two different alleles for a particular trait is ______.
Incapable of reproduction
homozygous
heterozygous and homozygous
heterozygous
Which statement pertains to Mendel’s law of segregation?
homozygous organisms are called hybrids
two alleles for each trait separate during meiosis
allele pairs are called a genotype
dominant traits are visible
Which of these pertains to Mendel’s law of independent assortment?
Observable characteristics of a trait
Separation of alleles during meiosis
Random distribution of alleles
Protein production
What is produced by the crossing over and independent assortment of genes?
X chromosomes
genetic recombination
Y chromosomes
alleles
Which statement is not true of genes located close together on the same chromosome?
They do not segregate independently.
They travel together during gamete formation.
They always segregate independently.
They are linked together.
What condition results from the occurrence of one or more extra sets of chromosomes?
genetic recombination
monohybrid cross
meiosis
polyploidy
Genes located close together on the same chromosome are said to be _______.
independent
linked
dominant
recessive
Which is not a characteristic of homologous chromosomes?
Homologous chromosomes have the same length.
Homologous chromosomes have the same centromere position.
Homologous chromosomes have the exact same type of allele at the same location.
Homologous chromosomes pair up during meiosis Ⅰ.