Sex Determination Flashcards

How to Use These Flashcards Effectively

1️⃣ Familiarise yourself with the flashcards:

  • Look through all the flashcards to see what’s on both sides.
  • Make sure you understand the information on each card. If something’s unclear, click the link to the revision notes at the bottom of the page for more details.

2️⃣ Test yourself:

  • Look at the question or prompt on each card and try to remember the answer before flipping it over.
  • Check the answer and make a note of any cards you find challenging and need to go over more.

3️⃣ Consistently Review and Practice:

  • Use spaced repetition: spend more time on the cards you struggle with and go over them more often.
  • Regularly review all the flashcards to help you better understand and retain the information over time.

Note: We may include questions that have multiple correct answers. It’s useful to remember specific examples to understand these concepts better.

PERSONALISED 1-TO-1 TUTORING

Need more help on this topic? Get 1-to-1 support

Get support with clear explanations, practice and feedback (Ages 5 to 16).

  • DBS-checked tutors
  • Flexible times
  • Parents can be updated

Want an ad-free experience? Subscribe to remove ads

How many pairs of chromosomes are in the human body, and what do they control?

The human body has 23 pairs of chromosomes. 22 pairs, called autosomes, control our characteristics, and the 23rd pair, known as sex chromosomes, determine the sex of an individual.

What are the sex chromosomes for females and males?

In females, the sex chromosomes are XX.

In males, the sex chromosomes are XY.

How is the biological sex of a child determined?

A child’s biological sex is determined by the sex chromosome contributed by the father. The mother always contributes an X chromosome, while the father can contribute either an X or a Y chromosome.

What is the chance of having a male or female child?

There is a 50% chance of having a female child (XX) and a 50% chance of having a male child (XY), making the average ratio of female to male offspring 1:1.

What chromosomes do egg and sperm cells carry?

All egg cells carry an X chromosome. Half of all sperm cells carry an X chromosome, and the other half carry a Y chromosome.

What is the significance of the 23rd pair of chromosomes?

The 23rd pair of chromosomes, known as the sex chromosomes, determine the sex of an individual.

Revision Notes
If you're still curious or want to learn even more, click the button below to check out the revision notes for this topic and deepen your understanding!
View revision notes for this topic