Chromosome Questions and Answers (Q&A)

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(B) 23 An unfertilized egg, or ovum, contains 23 chromosomes, which are paired with the 23 chromosomes from a sperm during fertilization. These chromosomes are paired up to determine the unborn child’s physical characteristics, including gender, skin tone, eye color, hair color, and...Read More

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(C) 23 A sperm cell contains 23 chromosomes, which is the same number of chromosomes contained in an egg, or ovum. When the sperm and egg combine during fertilization, they create what is called a zygote or, in layman’s terms, a fertilized egg. The zygote contains 46 chromosomes in...Read More

2 Answers

The chromosome that causes down syndrome is also known as chromosome 21. It is very likely for 1 out of 700 pregnancies for this extra chromosome to take place. The risk is always higher when the mother becomes pregnant and gives birth after the age of 35. When the mother becomes 40 years of...Read More

1 Answer

For a human male offspring, the correct answer is that the offspring must have one X chromosome and one Y chromosome. Other species don’t necessarily follow this model, but there is always a way to tell which chromosomes code for male and which code for female. This answer will focus more...Read More

1 Answer

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