Direction:Write the word that best describes the sentence below.
1.)Genes located on the X chromosomes
2.)a heterozygote shows a phenotype that is intermediate between the two homozygous phenotype
3.)the resulting heterozygote exhibit the traits of both parents
4.)are those that are expressed exclusively in one sex
5.) traits that are expressed in both sexes but more frequently in one than in the other sex
6.)refers to the variety of life in an area
7.)When the population of a species begins declining rapidly it is considered _________
8.)a mixture of solid and liquid waste materials that contaminate our lands that can lead to loss fertile land and occurence of many diseases
9.)the second cause of the mass extinction of plant and animal species
10.)the main cause of mass extinction caused by human activities​