Cell Division Interphase: G1, S Phase, G2

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Questions and Answers

What happens during the S phase of interphase?

The cell doubles all organelles except genetic information
Spindle fibers connect to the paired chromosomes
The nuclear envelope disintegrates
The cell undergoes DNA and nucleus replication (correct)

What is the main focus of the M phase of the cell cycle?

Focused on deletion/repair of defective chromosome (correct)
Replication of DNA and nucleus
Doubling of all organelles except genetic information
Preparation for division by undergoing both cell growth and DNA replication

What occurs during synapsis in meiosis?

The nuclear envelope disintegrates
Each chromosome pairs and binds to its corresponding homologous chromosome (correct)
Spindle fibers connect to the paired chromosomes
DNA condenses into a chromosome

What is the difference between allele and gene?

Allele refers to variations of the same gene, while gene refers to a certain trait (C) Signup and view all the answers

What happens at the end of prophase 1 in meiosis?

Each chromatid is a unique combination of the original homologous chromosome materials (C) Signup and view all the answers

What is the purpose of crossing over in meiosis?

To exchange segments of alleles between chromatids from homologous chromosomes (A) Signup and view all the answers

Flashcards

What happens during the S phase?

The cell copies its entire DNA, ensuring each new cell gets a complete set. This process is crucial for cell division and maintaining genetic information.

What is the main focus of the M phase?

The cell divides its nucleus and cytoplasm, creating two identical daughter cells. This phase culminates in the distribution of chromosomes to new cells.

What occurs during synapsis in meiosis?

Homologous chromosomes pair up, aligning side by side. This process allows for the exchange of genetic material through crossing over.

What is the difference between allele and gene?

An allele represents a specific version of a gene. Genes are like instructions for traits. Alleles provide variations within those instructions.

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What happens at the end of prophase 1 in meiosis?

Crossing over has shuffled the genetic material, creating unique chromosomes. This ensures genetic diversity in offspring.

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What is the purpose of crossing over in meiosis?

Crossing over allows for the exchange of genetic material between homologous chromosomes. This increases genetic diversity by creating new gene combinations.

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