discussion board on sex chromosomes in determing sex

You will be responding to a discussion board post. This post should be 80% you, and then facts found from other sources. Its not opinionated. It needs to have critical thinking. 125 Word minimum, APA format, cited. It needs to pertain to the paragraph and what the paragraph says. Other things can be added in as well, but make sure it is not just random facts. Below is the paragraph you will be responding to:

Post 2: Response to another student

20 Points Possible

1. Student submitted a thorough, informational and clear response that advanced the discussion with detail. Critical thinking about topic was included.


2. Assignment submitted on time and on a different day than other posts. Assignment met 125 word count minimum.


3. Appropriate scientific college-level sources were used. Post contained APA formatted references and in-text citations. The post was grammatically correct.


To begin talking about sex chromosomes in determing sex, we need to understand what is a sex chromosome.

According to the Encyclopedia Britannica, sex chromosomes , either of a pair of chromosomes that determine wheter an

individual is a male or female. The sex chromosomes of human beings and other mammals are designated by scientists as

X and Y. In humans the sex chromosomes comprise one pair of the total of 23 pairs of chromosomes. The other 22 pairs

of chromosomes are called autosomes. The main reason I picked this topic was because when I had my first child (female),

everyone told me that maybe I was a (Chancletero), in Puerto Rico that means you can only made girls. BUt my second child

was a boy, then they couldn’t call call me that nickname anymore, but everyone in my island used to tell me that the man

was the determing factor at the time of conception. Also apparently was proved that if a man wants a baby boy the man

needs to eat a lot of meat in other words a lot of protein, I personally don’t believe that one. By the book, what determines

whether a zygote develops into a male or female? The distinction begins with the combination of sex chromosomes

bequeathed to the zygote. Most of our cells have 23 pairs of chromosomes:22 pairs of autosomes and 1 pair of sex

chromosomes. A sex chromosome can be either a large X chromosome or a small Y chromosome( McGraw-Hill Education

p. 1027). The path to maleness or femaleness originates at the moment of meiosis, when a cell divides to produce

gametes, or sex cells having half the normal number of chromosomes. During meiosis the male XY sex chromosome pair

separates and passes on an X or a Y to separate gametes; the result is that one-half of the gametes (sperm) that are formed

contains the X chromosome and the other half contains the Y chromosome. The female has two X chromosomes, and all

female egg cells normally carry a single X. The eggs fertilized by X-bearing sperm become females (XX), whereas those

fertilized by Y-bearing sperm become males (XY).

Word Count: 372


McGraw-Hill Education, 2 Penn Plaza, New York, NY 10121


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