SEX DETERMINATION

SEX DETERMINATION

Human beings have 46 chromosomes in each cell. The males have XY sex chromosomes, whom produce gametes with X and Y chromosome, while females have the XX chromosomes. The sex of a child is determined by the type of chromosome he/she is receiving from the father. If sperm carries the X chromosome, then the child will be a girl, while a sperm that carries Y chromosome will be a boy.

PART 1

Study the punnett square showing a cross of male and a female sex chromosomes.

Fill in the Blank

What percent of children would you expect to be male?

Fill in the Blank

What percent of children would you expect to be female?

Fill in the Blank

Which sex chromosome is present in both male and female?

Fill in the Blank

Which sex chromosomes determines a person’s sex?

Fill in the Blank

Identify the sex of the person whose karyotype is shown on the left?

Fill in the Blank

Identify the sex of the person whose karyotype is shown on the left?

PART 2

Express your agreement or disagreement on each of the statement on the next slide.

Multiple Choice

The two male sex chromosomes are XY.

• agree

• disagree

Multiple Choice

Female always gives an X chromosome during fertilization.

• agree

• disagree

Multiple Choice

The sex of the child produced when an egg is fertilized by a sperm carrying a Y chromosome is female. .

• agree

• disagree

Multiple Choice

Male sex chromosome determines the sex of an offspring.

• agree

• disagree

Multiple Choice

If X chromosome is given by male and X from female, couple will have a baby girl.

• agree

• disagree

END OF ACTIVITY 2