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

• Black Hair

• Blue Eyes

• AA

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