A
B
C
D
E
100
DNA consists of a long chain of sub units called nucleotides. The nucleotide is made up of these three parts.
What are deoxyribose (ring-shaped sugar), phosphate group and nitrogenous base?
100
This is a unit of inherited info that carry a code for specific traits or functions
What is a gene?
100
During this stage the cell prepares for cell division by increasing its protein supply, crating more cytoplasmic organelles, and growing in size
What is interphase
100
This distributes the duplicated sets of chromosomes to two daughter nuclei and includes four continuous phases: prophase, metaphase, anaphase and telophase.
What is mitosis?
100
This is the region where the 2 chromatids are joined tightly together.
What is a centromere?
200
A mass of genetic material composed of DNA and proteins that condenses to form chromosomes and is located in the nucleus.
What is a chromatin?
200
In this stage of mitosis, the sister chromatids become visible. The sister chromatids attach to the long fibres of of the spindle. By the end of this stage, the nucleolus disappears and the nuclear envelope breaks down.
What is prophase?
200
During this stage of mitosis, the sister chromatids separate from their partners to become individual chromosomes. The spindle fibres pull the chrome's to opposite ends of the cell. Once the chromosomes have reached the poles and are in two separate groups, this stage is complete.
What is anaphase?
200
Most human cells are this which means that they contain two sets of chromosomes. The total number of chromosomes, 46 in humans, is called this number.
What is diploid?
200
During this stage of mitosis, the sister chromatids are fully attached to the spindle fibres and the chromatids are moved so that they are lined up across the middle of the cell.
What is metaphase?
300
During this stage of mitosis, the chromosomes begin to uncoil and take the form of chromatin, the spindle fibres disappear, and nuclear envelopes re-form around each set of daughter chromosomes. At the end of this stage, mitosis is complete.
What is telophase?
300
In this stage of meiosis, the nuclear membrane re-forms around each cluster of chromosomes. At this stage, the chromosomes of each daughter cell are present in duplicate, although each cell is considered haploid.
What is telophase I?
300
When this begins, the chromosomes are at the poles. Separate nuclei begin to form around each group of chromosomes. The process of meiosis is complete with four haploid daughter cells the final result.
What is telophase II?
300
A condition in which an individual has three copies of a particular chromosome.
What is a trisomy?
300
Similar to mitosis, this begins with two complete sets of duplicated chromosomes in the form of sister chromatids. During this, each duplicated chromosomes pairs with corresponding homologous chromosomes forming a tetrad.
What is prophase I?
400
The two chromosomes of matching pairs that carries the same series of genes controlling the same inherited traits. You inherit one chromosome of each pair from your mother and from your father.
What are homologous chromosomes?
400
A chromosomal change that occurs when part of a chromosome is repeated. The region can sometimes include an entire gene however if it is only repeated once, it may have no effect.
What is duplication?
400
This completes cell division by dividing the cytoplasm into two daughter cells, each with its own nucleus.
What is interphase?
400
During this stage, the tetrads move to the middle of the cell and line up.
What is metaphase I?
400
In this stage of meiosis, homologous chromosomes separate from the tetrad and migrate to opposite poles of the spindle. Sister chromatids remain attached at their centromeres.
What is anaphase I?
500
This exchange of genetic material between homologous chromosomes happens in prophase I of meiosis. When this occurs, homologous chromosomes are closely paired along their lengths and each gene on one pair of sister chromatids is precisely lined up with the corresponding gene on the adjacent pair.
What is crossing over?
500
This disease which is most common among French Canadians and certain Jewish populations attacks an infant’s nervous system and results in death by five years of age.
What is Tay-Sach's Disease?
500
In this, the nuclear membrane re-forms around each cluster of chromosomes. At this stage, the chromosomes of each daughter cell are present in duplicate, although each cell is considered haploid.
What is telophase I?
500
Single-celled organisms often reproduce by simple cell division in which a single cell or group of cells splits into two new genetically identical cells. This produces offspring that inherit all their genetic material from just one parent. As a result, the offspring are genetically identical to each other and to their parent.
What is asexual reproduction?
500
In this, the sister chromatids separate and move to opposite poles of the cell. Once separated, they are considered chromosomes.
What is anaphase II?
M
e
n
u