4-Males have ………………… sex chromosomes.

10-………………. is a chart used to follow the inheritance of a certain trait within a family.

9-Explain : -Color blindness is common in males and rare in females

8-Explain : Baldness is common in males not in females.

13-Who could a daughter inherit a sex linked allele from? a-Her mother only b-Her father only c-Either parent

2- Sex chromosome X is ……………………… than Y

18- B+B+ is bald in ............................... a- males and females b- males only c- females only

19-- Males can be carriers for color blindness. a-True b-False

5- In baldness, the male and female with the same genotype have ……………. phenotype.

7-From examples of mutation which is a sudden change in the gene a- Color blindness b- Hemophilia c-both

19-- Males can be carriers for color blindness. a-True b-False

1-Which is a mutation? A-a factor that causes all human disease B-any gene that is harmful C-a permanent change in a gene D-a piece of recombinant DNA