F2

Question 1

Ejaculation is controlled by the..

Answer 1

Sympathetic Nervous System

Question 2

Erection is controlled by the..

Answer 2

Parasympathetic Nervous System

Question 3

Sexual excitement activates the..

Answer 3

Parasympathetic Nervous System;
PNS releases nitric oxide (NO), causing vasodilation;
Erectile tissues engorge with blood

Question 4

Chromosomes & Meiosis

Answer 4

23 chromosomes (n = 23)
We are diploid organisms (2n = 46)
One set from each parent

Question 5

The two main functions of Meiosis are..

Answer 5

Meiosis is a reduction (2n -> n) producing haploid gametes;
Random assortment and crossover provide genetic variability;
These processes occur during Meiosis I

Question 6

Meiosis I is a..

Answer 6

Reduction division (2n -> n);
Each chromosome replicates itself;
Replicated homologues pair up forming a tetrad;
Random assortment and crossover occur;
2n tetrad splits into a pair of 1n sister chromatids

Question 7

Meiosis II is..

Answer 7

Mitosis of two haploid cells;
Sister chromatids split;
End result = 4 haploid gametes