Mini Exam Flashcards
A hypothesis is
a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.
The role of a control in an experiment is to
provide a basis of comparison to the experimental group.
Introduced Oryx populations at White Sands Missile Range are very successful.
Which of the following is NOT a hypothesis that might lead to an experiment that might explain this phenomenon?
Researchers found that the diet of the Oryx is different after the introduction, implying they have
A dependent variable is
the variable that is the result.
Cells spend most of their cell cycle in which phase?
Interphase
The genetic material is duplicated during?
The S phase
During which phase of meiosis do the chromosomes line in the middle of the cell?
metaphase
Two chromosomes in a nucleus that carry the same genes in the same positions on the chromosome but may have different versions of some traits constitute a pair of:
homologous chromosomes.
The products of meiosis 1 are
two genetically different haploid cells.
Which below best describes a difference between a chromosome and a gene?
A gene is one section of a chromosome but a chromosome carries many genes.
A diploid, somatic cell from an organism has 40 chromosomes. How many chromosomes would be in a haploid gamete from this organism?
20
How many pairs of autosomes do humans have?
22
A photograph of a person’s chromosomes lined up by homologous pairs and size of chromosomes is called a:
karyotype
DNA replication occurs
In the S phase of interphase
Chromosomes of diploid organisms that are NOT involved in sex determination are called
autosomes
When we say that an organism is diploid, we mean that
its cells have two of each type of chromosomes
Independent orientation of chromosomes at metaphase I results in an increase in the number of
possible combinations of chromosomes in gametes.
What is the typical result when a diploid cell undergoes meiosis?
four haploid cells
In a cell containing 10 chromosomes, meiosis results in the formation of _____ daughter chromosomes.
5
In humans, the haploid number of chromosomes is 23. Independent assortment has the possibility of producing ___ different gametes
2^23
The major contribution of sexual reproduction to evolution has been
to provide a process that creates greater genetic variation.
Prophase 1
Homologous chromosomes pair up, exchange genetic material (Crossing Over) and condense.
Metaphase 1
Homologous chromosome pairs align at the plate.
Anaphase 1
Homologous separate and move to opposite poles.
