Chromosome structure

Question 1

Chromosome

Answer 1

A linear molecule

Has genes along its length

Question 2

Replicated Chromosome

Answer 2

Has certain genes in a certain order

Question 3

Pair of homologous replicated chromosomes

Answer 3

Has the same genes in the same order, but not identical

Question 4

Sister Chromatids

Answer 4

Has the exact same genes AND alleles in the exact same order

Identical

Question 5

Non-Sister Chromatids

Answer 5

Has same genes in the same order but not alleles

Question 6

Nonhomologous Chromosomes

Answer 6

Has different genes in a different order

Different genes entirely

Question 7

Centromere

Answer 7

Links sister chromatids to each other

Center of the chromosome

Question 8

Metacentric

Answer 8

Centromere joins sister chromatids at (or close to) the middle

Question 9

Acrocentric

Answer 9

Centromere joins sister chromatids closer to one end

Question 10

P Arm

Answer 10

Short arm

Question 11

Q Arm

Answer 11

Long arm

Question 12

Tetrad

What phase and is it Mitosis or Meiosis?

Answer 12

Consists of two homologous chromosomes

Forms during Prophase I of Meiosis I

Question 13

Chiasma

How does it form?

Answer 13

Physically links homologous chromosomes

Forms during crossover recombination event in Meiosis

Question 14

Recombination

When does this take place?

Answer 14

Homologous chromosomes line up in pairs and swap segments of DNA

Takes place during Prophase I of Meiosis I

Question 15

Tetraploid

Answer 15

Has four sets of chromosomes

Signified by 4n

Question 16

Diploid

Answer 16

Two complete sets of chromosomes, one from each parent

Signified by 2n

Question 17

Haploid

Answer 17

Contains a single set of chromosomes