Sex Determination (OCR GCSE Biology A (Gateway Science Suite)): Flashcards
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12 cards from this deck
How many chromosome pairs in human body cells?
How many chromosome pairs in human body cells?
23 pairs
How many chromosome pairs control characteristics?
How many chromosome pairs control characteristics?
22
What does the 23rd chromosome pair carry?
What does the 23rd chromosome pair carry?
Sex determining genes
What are the two types of sex chromosomes?
What are the two types of sex chromosomes?
X chromosomes and Y chromosomes
What happens to sex chromosomes during meiosis?
What happens to sex chromosomes during meiosis?
One sex chromosome goes into each gamete
What sex chromosomes do females have?
What sex chromosomes do females have?
Two X chromosomes (XX)
Which sex chromosome do females pass on in eggs?
Which sex chromosome do females pass on in eggs?
X chromosomes
What sex chromosomes do males have?
What sex chromosomes do males have?
One X chromosome and one Y chromosome (XY)
Which sex chromosomes can males pass on in sperm?
Which sex chromosomes can males pass on in sperm?
X or Y chromosomes
What tool is used to show sex inheritance?
What tool is used to show sex inheritance?
Punnett squares
What is the chance of a child being male?
What is the chance of a child being male?
50%
What is the chance of a child being female?
What is the chance of a child being female?
50%