How many chromosomes does the family Ursidae have? What is a haploid gamete? What are chromatids? How many pairs of chromosomes does the human body have? How many chromosomes are in a plant cell? Which part of the sperm contains the chromosomes?
Chromoplasm is referred to the part of the nucleoplasm that condenses to form the chromosomes. It is rich in chromatin threads (that contain DNA) and histone proteins. In bacterial cell biology: It is defined as the material present in the periphery of the cytoplasm in cyanobacteria (blue-...
Chromosomes, DNA (deoxyribonucleic acid) and genes are elaborate instructions that determine everything about a human body. They give cells direction on how to form and function in the body. In short, cells contain chromosomes; chromosomes contain DNA; and DNA contains gene segments. According ...
Through microscopic techniques, the concentration of chromosomes (in the nucleus or the nucleoids) causes parts of the cell to have a dense, dark appearance which represents the regions of the cell that contains DNA material. In organisms with several chromosomes (e.g. human beings have 23 pa...
What is the biological importance of mitosis? Why do chromosomes need to go outside the nucleus during cell division? What is the importance of mitosis? What are chromosome territories and why are they important? What is the importance of mitosis to living organisms?
This arrangement is reminiscent of the recombining pseudoautosomal regions at the termini of X and Y chromosomes, which enable correct pairing and segre- gation at meiosis. The long-term evolutionary trajectory of the non-recombining sex chromo- some, that is, the Y chromosome in male mammals ...
1 :a usually round part of most cells that is enclosed in a double membrane, controls the activities of the cell, and contains the chromosomes. 2 : the central part of an atom that comprises nearly all of the atomic mass and that consists of protons and neutrons. ...
to form structures calledchromosomes. Each chromosome contains a single DNA molecule, wrapped tightly around spool-like proteins called histones, which provide chromosomes their structure. Humans have 23 pairs of chromosomes, which are found inside each cell's nucleus, the control center of the cell...
Contains all the 23 chromosomes of the sperm cell, that is, half the genetic information of the future embrion. This is the only part of the sperm cell that enters into the egg cell. As such it is the most important part of the spermatozoon. Its purpose is to fuse with the nucleus of...
one flagellum or tail, which allows them to move independently. The head contains very little cytoplasm compared to other cells and carries very densely packedchromosomeswithin thenucleus. Like all sex cells,spermcells are haploid, containing only half the number of chromosomes typical of the ...