Exam 18: Patterns of Chromosome Inheritance

Suppose that nondisjunction occurs during meiosis II in oogenesis,and each of the resulting 4 cells is fertilized with a normal sperm.How many cells are normal and how many have a chromosomal trisomy?

In both spermatogenesis and oogenesis,one sperm/egg forms from one primary spermatocyte/oocyte.

Which comes first: mitosis or cytokinesis?

Which of the following is not a reason chorionic villi sampling is used to determine the fetal karyotype?

From Figure 18.1 it can be seen that a homologous pair of chromosomes contains how many chromatids?

Which of the following is not a stage of mitosis?

In a karyotype,each chromosome contains two sister chromatids.

If a cell has 4 pair of chromosomes,after mitosis each daughter cell will have how many chromosomes?

When does a chromosome go from one chromatid to two sister chromatids?

Which of the following syndromes has a karyotype with a missing X chromosome?

How are G₁ and G₂ different?

If nondisjunction occurs during meiosis I,how many of the final 4 products will be abnormal?

Which of the following is part of the mitotic spindle?

Which cell could you not use to produce a karyotype?

Which of the following is not a symptom of Down syndrome?

When do the centromeres divide in meiosis?

There is no mechanism to ensure the exact partitioning of the cytoplasm as there is of the DNA.

When a child is born,mitosis ceases to function.

At which stage of mitosis do you first see the chromosomes appearing?

If the secondary oocyte is not fertilized,it does not complete meiosis II.