Biology 120 Notes (Part 16) Starting and Finishing Meiosis II, Life Cycle, and Nondisjunction

telophase II

In ________ and Cytokinesis, chromosomes arrive at the poles of the cell and decondense.

Cleavage

________ furrows divide the two cells into four haploid cells.

Meiosis

________ produces gametes through spermiogenesis and oogenesis. It is very similar to Mitosis, in terms of cell division, and results in four haploid daughter cells.

Life cycle

________ is a term that describes how the gamete and zygote coming together to form a zygote.

Monosomy

________ describes how there is only one of a chromosome.

Turner Syndrome

________ affects 1 in 10, 000 females.

Nondisjunction

________ describes how there is a failure of chromosomes to separate properly.

diploid zygote

An egg fertilized by a sperm produces a(n) ________.

uterus

They have small, underdeveloped ovaries, oviducts, and ________.

Nuclear envelopes

________ surround the four nuclei.

Meiosis I

________ is a reduction division.

Oogenesis

________ occurs in the female ovaries.

Spermiogenesis

________ occurs in the testes of males.

Trisomy

________ describes how there is three of a particular type of chromosome.

Klinefelter Syndrome

________ describes how males can have underdeveloped testes and prostate; some breast underdevelopment.

prometaphase II

In ________, the nuclear envelope disappears, and the spindle fibers engage the individual kinetochores on the sister chromatids.

anaphase II

In ________, sister chromatids are pulled apart by the shortening of the kinetochore microtubules.

Non kinetochore microtubules

________ lengthen the cell.

interkinesis

Before Meiosis II starts, a process called ______________ occurs. It is a short resting period, similar to Interphase, but without DNA replication.

prophase II

In ___________, sister chromatids condense. A new spindle begins to form. The nuclear envelope starts to fragment.

metaphase II

In _________, sister chromatids line up at the metaphase plate.