Unit 3: Lesson 1 and 2

What is one key difference between meiosis and mitosis?

• a) Meiosis creates four different cells, while mitosis creates two identical cells.

• b) Meiosis and mitosis both create two identical cells.

• c) Mitosis produces gametes, while meiosis produces body cells.

What is the purpose of sister chromatids during cell division?

• a) To help with genetic diversity.

• b) To support cell division.

• c) To provide identical copies of chromosomes for cell division.

What happens during Prophase II of meiosis?

• a) Sister chromatids separate and move to opposite poles.

• b) Chromosomes condense and the nuclear envelope breaks down.

• c) Chromosomes line up in the middle of the cell.

What happens during Telophase I and cytokinesis?

• a) Chromosomes gather at the poles, and the cytoplasm divides.

• b) Chromosomes condense, and the cytoplasm multiplies.

Sort the following

Groups:

(a) PHENOTYPE

,

(b) GENOTYPE

• aa

• AA

• Blue Eyes

• Black Hair

The genotype "Hh" consists of one dominant allele (H) and one recessive allele (h). Since the dominant allele determines the phenotype, the individual with "Hh" will show the dominant trait.

• Curly Toes

• Hairy Toes

• Hairless Toes

7. What does "ff" indicate in terms of zygosity?

• a) Homozygous Recessive

• b) Homozygous Dominant

What is the probability of a chicken being brown in the genetic cross example?

• 3/4

• 2/4

• 1/4

What is the role of spindle fibers during cell division?

• a) To separate sister chromatids moving it apart.

• b) To make chromosomes bigger.

• c) To form the nuclear envelope.

Which phase of meiosis is characterized by crossing over?

• a. Prophase I

• b. Metaphase I

• c. Anaphase I