Biology: Genetics and Cell Biology: cram pack

haemophilia is X-linked recessive (allele h). A carrier mother, X^HX^h, has children with an affected father, X^hY. The mother's gametes run down the side. Click the cell for an affected daughter.

1. 1X^h × X^h
2. 2X^h × Y
3. 3X^H × X^h
4. 4X^H × Y

Two AaBb parents are crossed. Gene A gives yellow seeds (dominant) or green seeds; gene B gives purple flowers (dominant) or white flowers. Click the one cell for an offspring that is homozygous for yellow seeds and shows white flowers.

1. 1ab × aB
2. 2ab × Ab
3. 3ab × ab
4. 4ab × AB
5. 5aB × aB
6. 6aB × Ab
7. 7aB × ab
8. 8aB × AB
9. 9AB × aB
10. 10AB × Ab
11. 11AB × ab
12. 12AB × AB
13. 13Ab × aB
14. 14Ab × Ab
15. 15Ab × ab
16. 16Ab × AB

Apoptosis is:

1. AUncontrolled cell division
2. BCell fusion
3. CProgrammed cell death
4. DCell growth

In the Meselson–Stahl experiment, bacteria grown in ¹⁵N were moved to ¹⁴N. After one round of replication all DNA formed one band of intermediate density. Which model did this rule out?

1. ABoth semi-conservative and dispersive models
2. BThe dispersive model
3. CThe conservative model
4. DThe semi-conservative model