3.15 - Sex of Offspring Flashcards
How many pairs of chromosomes do human body cells have?
Human body cells have 23 pairs of chromosomes.
What do the first 22 pairs of chromosomes control?
The first 22 pairs of chromosomes control characteristics.
What is unique about the 23rd pair of chromosomes?
The 23rd pair carries sex determining genes and can look different from each other.
How do X and Y chromosomes differ?
Y chromosomes are much smaller than X chromosomes.
What are the two possible chromosomes in the 23rd pair?
The two possible chromosomes in the 23rd pair are X chromosomes and Y chromosomes.
What happens during meiosis regarding sex chromosomes?
During meiosis, one sex chromosome goes into each gamete.
What chromosomes do females pass on in their eggs?
Females have two X chromosomes, so they only pass on X chromosomes in their eggs.
What chromosomes can males pass on in their sperm?
Males have one X chromosome and one Y chromosome, so they can pass on either X or Y chromosomes in their sperm.
What tool can be used to show sex inheritance?
Punnett squares can be used to show sex inheritance.
What is the probability of a child being male or female?
There is a 50% chance of the child being male and a 50% chance of the child being female.
