Mitosis
Order the cell cycle phases in the correct order starting with the part of the cycle where normal cellular metabolism occurs
G1 to S to G2 to M
If an organism has identical alleles for one trait of interest, this organism is ______
Homozygous
True or False: In meiosis, the cells produced at the end are genetically identical to the cell at the beginning?
False
Beginning with a fertilized egg cell (zygote), how many cells would be present in an embryo following a series of five cell divisions?
32
When DNA is condensed around histone proteins, it is called ________.
Chromatin
All seven of the pea plant traits studied by Mendel obeyed the principle of independent assortment. What does this indicate about those traits?
All of the genes controlling the traits behaved as if they were located on different chromosomes
During meiosis, which phase does crossing over occur?
Prophase I
A cell in G2 of the cell division cycle contains 20 chromatids. How many centromeres are present in this cell?
20
Just prior to cytokinesis, the cells has completed which phase of the cycle?
Telophase
When crossing an organism that is homozygous recessive for a single trait with one that is heterozygous for the same trait, what is the chance of producing an offspring with the homozygous recessive phenotype?
50%
A diploid organism has 40 chromosomes, how many homologous chromosomes would be present in gamete?
20, gametes are haploid
Somatic cells in elephants have 56 chromosomes. How many chromosomes would be carried by the gametes produced by elephants?
28
When a cell is in late anaphase of mitosis, what may be observed?
a clear area in the center of the dividing cell
Cystic fibrosis affects the lungs, the pancreas, the digestive system, and other organs, resulting in symptoms ranging from breathing difficulties to recurrent infections. What term best describes this expression of phenotypes?
Pleiotropy
The major organizational events that set up differences between mitosis and meiosis occur in the ______ phase
Prophase
What will be the result if a eukaryotic cell completes mitosis but does not undergo cytokinesis?
One cell with two nuclei, each identical to the nucleus of the parent cell
Which of the following does not occur during mitotic phase of the cell cycle? Replication of the DNA, condensation of the chromosomes, separation of sister chromatids, spindle formation
Replication of the DNA
In certain plants, the tall trait is dominant over the short trait. If a plant heterozygous for the tall trait is crossed with a homozygous tall plant, what is the probability that the offspring will exhibit the short trait?
0%
During Metaphase I, the random assortment of chromosomes allows for ___________, which means each gamete does not have the exact same genes as the parents.
Independent Assortment
After ligand binding, how does the receptor initiate the signaling cascade?
The receptor undergoes a conformational change