Ch 9 Cell Reproduction Questions 2

Explanation
Meiotic cell division, specifically meiosis I, produces four haploid daughter cells from each diploid parental cell. This process involves two rounds of cell division, resulting in the formation of gametes or reproductive cells such as sperm and eggs. These daughter cells contain half the number of chromosomes compared to the parental cell, allowing for genetic diversity during sexual reproduction.

Explanation
At the end of meiosis I in animals, the first haploid nuclei are produced. Meiosis I is the first division of meiosis, where the homologous chromosomes separate, resulting in two daughter cells with half the number of chromosomes as the parent cell. These daughter cells are haploid, meaning they have only one set of chromosomes. Therefore, meiosis I is the correct answer as it accurately describes the process in which the first haploid nuclei are formed in animals.

Explanation
The correct answer is gametes or sperm eggs. Meiotic cell division is a type of cell division that occurs in reproductive cells to produce gametes. Gametes are haploid cells, meaning they contain half the number of chromosomes as the parent cell. In males, the haploid gametes are called sperm, while in females, they are called eggs. Therefore, the correct answer is gametes or sperm eggs.

Explanation
During prophase of meiosis I, homologous chromosomes intertwine, forming structures called chiasmata. This is the stage where crossing over occurs, which is the exchange of genetic material between homologous chromosomes. This process is important for genetic variation and the creation of genetically unique gametes.

Explanation
Chiasmata structures are the sites where crossing over occurs during meiosis. Crossing over is the exchange of genetic material between homologous chromosomes, which leads to genetic recombination and variation in offspring. This process occurs during prophase I of meiosis. Therefore, the correct answer is "crossing over."

Explanation
The processes that promote genetic variability of offspring during sexual reproduction are shuffling of homologues, crossing over, and fusion of gametes. Shuffling of homologues occurs during meiosis I, where homologous chromosomes exchange genetic material. Crossing over also occurs during meiosis I, where sections of homologous chromosomes are exchanged, further increasing genetic diversity. Finally, fusion of gametes occurs during fertilization, combining the genetic material from two different individuals to create a unique combination of genes in the offspring.