Genetics Quiz

Long arm of a chromosome located below the centromere.

• d arm

• b arm

• q arm

• p arm

How many gamete/s are formed after a one cycle of meiosis in females?

• 1

• 2

• 4

• 3

Sex-determining chromosomes are homologous in size, centromere placement, arm ratio, or genetic content but NOT in genetic regions.

• False

• True

__________ placement determines the arm ratios and shape of the chromosomes.

• Kinteochore

• Centrosome

• Locus

• Centromere

Haploid number of Homo sapiens.

• 46

• 22

• 43

• 23

All of the following are needed for disjunction to occur, EXCEPT

• The centromere region should be cleaved by separase

• Shugoshin complex must be degraded

• Sister chromatids of each chromosome are pulled in opposite poles of the cell.

• All of the above are correct.

This is the anaphase shape of a chromosome with the chromosome. _______metaphase shape in which the centromere is located at the end.

• Submetacentric

• Acrocentric

• Metacentric

• Telocentric

Why are chromosomes visible through the light microscope during the different stages of mitosis?

• The chromatin fibers coils and folds resulting in a condensed state

• The chromatin fibers uncoils and unfolds resulting in a condensed state

• The chromatin fibers coils and folds resulting in a decondensed state

• The chromatin fibers uncoils and folds resulting in a decondensed state

The process of genetic exchange where there is an exchange of paternal and maternal chromatid, happens at what specific chromosome structure?

• Chiasma

• Tetrad

• Terminalization

• Bivalent

A group of researchers are identifying a possible error in meiosis wherein there is a mutation in cohesins which resulted in non-separation (nondisjunction) of the tetrad during anaphase. An example of a disease where there is an error in meiosis is?

• Huntington Disease

• Diabetes Mellitus

• Major Depressive Disorder

• Down Syndrome