| a person bearing an x and y chromosomes | 1.64 | 0.9 | 591 | 39 | 46 |
| the human x and y chromosomes | 0.81 | 0.3 | 9040 | 29 | 16 |
| the x chromosome or the y chromosome | 1.25 | 0.4 | 8316 | 36 | 61 |
| the x and y chromosomes | 1.71 | 1 | 4892 | 23 | 74 |
| the x and y chromosomes in humans | 1.67 | 0.9 | 9684 | 33 | 74 |
| x and y chromosomes definition | 1.73 | 0.4 | 3615 | 30 | 87 |
| x and y chromosomes explained | 1.51 | 0.2 | 2730 | 29 | 33 |
| an extra y chromosome | 1.99 | 0.8 | 2894 | 21 | 83 |
| x or y chromosome male | 1.57 | 0.8 | 6842 | 22 | 82 |
| x or y chromosome linked | 1.19 | 0.1 | 6186 | 24 | 64 |
| the human x and y chromosomes quizlet | 0.64 | 0.2 | 7168 | 37 | 68 |
| what is x and y chromosomes for human | 0.93 | 0.1 | 3988 | 37 | 85 |
| the human x and y chromosomes are | 0.06 | 1 | 5213 | 33 | 94 |
| human xy chromosome | 0.97 | 0.9 | 7709 | 19 | 53 |
| x chromosomes and y chromosomes | 1.18 | 0.6 | 6297 | 31 | 12 |
| what are the x and y chromosomes | 0.02 | 0.9 | 4461 | 32 | 60 |
| x and y chromosome facts | 1.26 | 1 | 9464 | 24 | 61 |
