An X and a Y would indicate a male.
And just in case you were wondering; an X and X would indicate a female.
In humans and other mammals, a male has XY sex chromosomes. In birds, a male has XX chromosomes. In amphibians, male chromosomes look the same as female chromosomes.
There are two chromosomes that determine the sex of the baby, X and Y. The women's ova are always chromosome X and the male sperm determines the sex of the baby, having the option of being either X or Y. If the sperm is and X then the sex will be female, and if it is a Y it will be a male. XX=girl, XY=boy.
We call these sex chromosomes. Whether you are a male or female depends on the presence or absence of certain chromosomes. The sex chromosomes are the X chromosome and the Y chromosome. If you have two XX, you will show female characteristics and If you have XY you will show male characteristics.
XY chromosomes SDT
Normal male humans have the sex chromosomes XY. The presence of the Y chromosome determines sex in humans - so a person with XXY will be male.
XY Chromosomes = Males XX Chromosomes = Females
sex chromosomes
XY
Xy chromosomes= boy xx chromosomes= female
A male has two sex chromosomes, one X and one Y.
Male - in humans the sex is determined by the presence of a Y chromosome. In other animals sex can be determined by the ratio of sex chromosomes, or the total number of chromosomes.
There are two sex chromosomes, X and Y. A female has XX and a male has XY.