Answer:
Girls have two X chromosomes and boys have chromosomes (XY).
Explanation:
Girls have two X chromosomes (XX), and boys have one X and one Y chromosome (XY). Whether a baby will be a boy or a girl is determined at the time of conception.
Answer:
50% tongue and 50% no tongue.
Explanation:
Upper case T is dominant over lower case t recessive, so we can see that there are two Tt and two tt.
you have to make the Table like this.
T t
t Tt tt
t Tt tt
Final answer 50% tongue and 50% no tongue.
The mistake is fixed.
There is 20 chromosomes in a adult wild mouse