A researcher observes a unicellular organism reproducing asexually. The daughter cells are genetically identical except for a few minor variations. Which mechanism is MOST likely responsible for these variations?
Crossing over during mitosis
Independent assortment of chromosomes
Random mutations during DNA replication
Conjugation with another individual
Related Questions
Which statement is FALSE concerning the polarity of water molecules?
It arises from the unequal sharing of electrons between oxygen and hydrogen.
It contributes to the formation of hydrogen bonds.
It allows water to dissolve many ionic compounds.
It causes ice to be less dense than liquid water.
Which of the following statements is incorrect regarding the properties of water?
Water has a high specific heat capacity.
Water is a polar molecule.
Ice is denser than liquid water.
Water molecules form hydrogen bonds.
Which of the following is NOT a consequence of water's high surface tension?
Small insects can walk on water.
Water rises in capillary tubes.
Water droplets form a spherical shape.
Objects denser than water sink rapidly.
A researcher observes a unicellular organism reproducing asexually. The daughter cells are genetically identical except for a few minor variations. Which mechanism is MOST likely responsible for these variations?
Crossing over during mitosis
Independent assortment of chromosomes
Random mutations during DNA replication
Conjugation with another individual
If a substance is hydrophobic, it is likely to be:
A good solvent for ionic compounds.
Highly soluble in water.
Able to form hydrogen bonds with water.
Insoluble in water.
Water's high specific heat capacity is primarily a consequence of:
The low density of water.
The polarity of water molecules.
Hydrogen bonding between water molecules.
The weak van der Waals forces between water molecules.
Which of the following is NOT a characteristic typically associated with organisms that predominantly reproduce asexually?
Rapid population growth in stable environments
Adaptation to narrow ecological niches
High genetic diversity within populations
Reduced energy expenditure on mate finding
Certain plants can reproduce both sexually and asexually. Under which of the following environmental conditions would asexual reproduction be MOST advantageous?
Unstable environment with frequent disturbances
Environment with high pathogen pressure
Environment with limited resources and high competition
Stable environment with abundant resources
A certain species of rotifer reproduces exclusively through parthenogenesis. A diploid female with a rare recessive allele 'a' on one of her homologous chromosomes undergoes thelytoky. Assuming no mutations, what is the probability that her offspring will express the recessive phenotype?
0
0.25
0.5
1
Which of the following combinations of reproductive strategies is LEAST likely to be observed in a single organism?
Binary fission and budding
Fragmentation and regeneration
Fragmentation and parthenogenesis
Budding and gemmule formation
