Karyotype and Chromosomes

Multiple Choice

Crossing over happens when part of the genetic information of one chromosome switches places with the genetic information from another chromosome. Another term for this process is

• genetic recombination

• genetic reduction

• a mutation

• nondisjunction

Karyotypes

Genetics

When do you think the picture is taken in the cell cycle?

Multiple Choice

Which phase of the cell cycle is when scientists take a picture to construct a karyotype?

• Interphase

• Prophase

• Metaphase

• Anaphase

Multiple Choice

The karyotype diagram below represents a human female with the genetic disorder known as Turner syndrome. Chromosomal analysis of this karyotype reveals the mutation is a result of

• a missing X chromosome

• a missing Y chromosome

• an extra 21 chromosome

• missing chromosome #9

Multiple Choice

The karyotype diagram below represents a human male. Chromosomal analysis of this karyotype reveals the abnormality in this karyotype is:

• a missing X chromosome

• a missing Y chromosome

• an extra 21 chromosome

• missing chromosome #9

Multiple Select

Homologous pairs:

(select all that apply)

• Have the same genes on them

• May have different alleles

• Each comes from one parent

• Combine to give you your genotypes

Multiple Choice

Do homologous chromosomes always look identical?

• Yes, same everything (shape, size, position, and bands)

• No, not quite (different positions but same band patterns and similar size)

Multiple Choice

By looking at the chromosomes how can you tell that this person is biologically female?

• Because there are two X chromosomes

• Because there are more chromosomes than in a male

Multiple Choice

By looking at the chromosomes is this individual biologically male or female? How do you know?

• Female, because they have two X chromosomes

• Male, because they have one X and one Y chromosome

Multiple Choice

What is the mutation in this persons chromosomes?

• There is only one X

• 7 is shaped like a hockey stick

• There's an extra 21

• 1 is too curved

Multiple Choice

This is called Turners syndrome, can you notice the mutation in the chromosomes?

• Both chromosomes 1 are bent

• There are too many chromosomes

• There are too many of chromosome 3

• There is no Y chromosome

Multiple Choice

These are the chromosomes of someone with Kleinfelters syndrome. What is different about their chromosomes?

• There is only one Y chromosome

• One of the 5th chromosomes is too curved

• There is an extra X chromosome

• There are too few chromosomes

Multiple Choice

This is known as Edwards Syndrome, can you identify the chromosomal mutation?

• Chromosomes 1 and 2 are bent

• There is no Y chromosome

• This persons chromosomes are normal

• There are 3 of chromosomes 18

Multiple Choice

Describe this karyotype.

• Male with no obvious disorder

• Female with no obvious disorder

• Female with disorder

• Male with disorder

Multiple Choice

Describe this karyotype.

• Male with no obvious disorder

• Female with no obvious disorder

• Female with disorder

• Male with disorder