MEDIUM
AS and A Level
IMPORTANT
Earn 100
Name the stage of meiosis at which crossing over between chromatids of homologous chromosomes takes place. State whether the stage is during the division I or division II
Important Questions on Inheritance
MEDIUM
AS and A Level
IMPORTANT
Name the stage of meiosis at which homologous chromosomes separates. State whether the stage is during the division I or division II
MEDIUM
AS and A Level
IMPORTANT
Name the stage of meiosis at which centromeres split and chromatids separate. State whether the stage is during the division I or division II
MEDIUM
AS and A Level
IMPORTANT
Name the stage of meiosis at which haploid nuclei are first formed. State whether the stage is during the division I or division II
HARD
AS and A Level
IMPORTANT
A cell with three sets of chromosomes is said to be triploid, 3n. A cell with four sets of chromosomes is said to be tetraploid, 4n. Could meiosis take place in a 3n or a 4n cell? Explain.
HARD
AS and A Level
IMPORTANT
A diploid (2n) chromosome number of Drosophila is 8. Copy and complete the table given below to show the different outcomes of the mitotic and meiotic division of a Drosophila cell.
| Mitosis | Meiosis | |
| number of division cycles | ||
| number of daughter cells | ||
| number of chromosomes per nucleus in daughter cells |
HARD
AS and A Level
IMPORTANT
Construct a genetic diagram to predict the chance that a child born to two parents, both with blood group AB, will have blood group B. Use the symbols IA and IB to represent the alleles.
HARD
AS and A Level
IMPORTANT
A woman with blood group A and a man with blood group B have a child with blood group O. Use this information to determine the genotypes of the woman and the man, and then construct a genetic diagram to explain how the child inherited her blood group. Use the symbols IA, IB and IO.
HARD
AS and A Level
IMPORTANT
Construct a genetic diagram to show that all of the offspring of a cross between a homozygous brown rabbit and a white rabbit are heterozygous brown rabbit.
