BIO 201 CBT PRACTICE

1. Which of the following traits is / are known to be Y linked in man? I. a testis determining factor, II. Y - histocompatibility, III. hair on the ear rims of some men

2. In which of the following human sex abnormallies are those affected recognized as females but are poorly developed?

3. The importance of Genetics is in connection with ____.

4. _____ embryos die early in development.

5. The following are assumptions of quantitative inheritance except _____.

6. The F2 generation of a cross of two pure breeding parents (P) with two contrasting characters (tall and short) and tall is dominant over short is :

7. The following are features of testicular feminization except _____.

8. The following are patterns of sex chromosome distribution except ____.

9. Which of the following is the sexual chromosomal constitution of females affected by Down's syndrome in man?

10. ____ is a sex influenced trait in males.

11. In Mendels laws of inheritance, F means __.

12. _____ proposed the theory of germplas.

13. Non disjunction is not the only cause of Down syndrome.

14. ____ found that somatic cells of female grasshopper contain 24 chromosomes while male cells contain 23 chromosomes

15. The following are examples of sex ?? limited traits except _____.

16. The following are parallels between genetic and cytological facts except ___.

17. In an experiment, the F1 generation of a cross between a brown cock and a white cock were all brown because the gene for the ___.

18. Which of the following is a sex chromosomal aberation?

19. In Mendel's laws of inheritance, F means __.

20. Which of the following is an example of discontinuous variation?

21. Which of the following conditions is produced by Trisomy-21 in man?

22. The following stages of cell division would not be affected by non disjunction except _____.

23. If a tall man (Tt) marries a short woman (tt) and they have four children. The offspring of these children will be _____.:

24. Males have haploid chromosomal constitution and females diploid in ____.

25. Sex reversal without chromosomal change possible in females of ____.

26. Dispermy results in production of _____ asters in the zygote.

27. Most of the difficulties students experience in Genetics has to do with the fact that:

28. The following are assumptions in quantitative inheritance except ____.

29. The probability of the simultaneous occurrence of two or more events is equal to ____ of their individual occurrences.

30. Non disjunction is not the only cause of Downs syndrome.

31. In a genetic cross; AaBbCc x AaBbCc. How many genetic fusions is possible?

32. To facilitate the study of quantitative inheritance, ___ were propounded

33. In a genetic experiment; AaBbCc x AaBbCc, how many genes are involved in this experiment?

34. The following statements are true of genes except ____.

35. Sex limited genes are otherwise called ___.

36. Which of the following organisms have haploid males and diploid females?

37. Mendel discovered that the F1 generation of a cross between a brown cock and a white cock were all brown because the gene for the :

38. Who worked on reduction division?

39. Aristotles theories during the early periods of development of Genetics implied that the fathers semen supply the substance while the mothers blood supply the form.

40. Genetics entail substantial psychological reasoning