Master Chromosome Forms with Picmonic for Pre-Health

With Picmonic, facts become pictures. We've taken what the science shows - image mnemonics work - but we've boosted the effectiveness by building and associating memorable characters, interesting audio stories, and built-in quizzing.

Chromosome Forms

Forms of Chromosomes
Picmonic
There are many terms used to refer to different groupings and organizations of chromosomes during cell replication and division. Chromatid is the condensed version of chromatin, which consists of DNA wound around histones. Chromatid is only formed during cell reproduction and division, because the copies of genetic material are most easily divided while condensed. One chromatid can be referred to as a chromosome. Sister chromatids consist of an original chromatid and its copy joined at the centromere, and can also be called a chromosome. Homologous chromosomes are two chromosomes (two sister chromatid pairs; four chromatids total) that group together during meiosis I, but are also present in mitosis. They code for the same genes but have different alleles. Homologous chromosomes are associated with synapsis and crossing over in meiosis I. Finally, the tetrad is a formation where two homologous chromosomes overlap, and it is named because of the four chromatids in close proximity. This occurs in meiosis I during prophase, and is briefly seen in metaphase before the homologous chromosomes are separated.
4 KEY FACTS
CHARACTERISTICS
Chromatid
Chrome-kid

Chromatid is the condensed form of chromatin, which consists of DNA wound around histones. It is typically only seen during cell replication and division, as the genetic material must condense in order to be divided evenly between cells.

Sister Chromatids
Sister Chrome-kids

Sister chromatids consist of one chromatid and a replicated copy connected at the centromere. They are typically homozygous with similar traits, but may have slight differences due to mutation or crossing over (meiosis I). They only exist during cell reproduction and division. During mitosis and meiosis II, sister chromatids are pulled apart into separate daughter cells.

Homologous Chromosomes
Home-of-logs Chromosomes

Homologous chromosomes are chromosome pairs that code for the same genes at similar loci, but have allelic variance as one chromosome is from the mother and the other from the father. During meiosis I, homologous chromosomes synapse and exchange genetic information when crossing over.

Tetrad
Tetris-chromosomes

The tetrad is formed by two chromosomes (each chromosome consisting of two sister chromatids) grouped together. It only occurs in meiosis I, as homologous chromosomes do not synapse in mitosis or meiosis II.

Unlock all 4 facts & definitions with Picmonic Free!

JOIN FREE

Take the Chromosome Forms Quiz

Picmonic's rapid review multiple-choice quiz allows you to assess your knowledge.

START QUIZ NOW

It's worth every penny

Picmonic for Pre-Health Covers

Pre-Health
100+ Videos
1000+ Facts

*Average video play time: 2-3 minutes

Loading
Search for a specific Video or category now!
Or create your own Picmonic

Our Story Mnemonics Increase Mastery and Retention

Memorize facts with phonetic mnemonics

Unforgettable characters with concise but impactful videos (2-4 min each)

Ace Your Pre-Health Classes & Exams with Picmonic:

Over 890,000 students use Picmonic’s picture mnemonics to improve knowledge, retention, and exam performance.

Choose the #1 Pre-Health student study app.

Picmonic for Pre-Health covers information that is relevant to your entire Pre-Health education. Whether you’re studying for your classes or getting ready to conquer the MCAT, we’re here to help.

Works better than traditional Pre-Health flashcards.

Research shows that students who use Picmonic see a 331% improvement in memory retention and a 50% improvement in test scores.