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Why don't the sex chromosomes have true homologous partners like the autosomes?
Wiki User
∙ 6y ago
Well... they can. In females (who contain XX chromosomes) there is a homologous pair of chromosomes. In males (XY) the Y chromosome must be in existence to activate the development of male characteristics... Otherwise they'd be females.
Wiki User
∙ 6y ago
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Is homologous chromosomes only present in cells that undergo meiosis?
Usually they dont as homologous chromosomes form bivalents with other homologous chromosomes and crossing over occurs between the 2. But if a chiasmata does form between the t homologous chromosomes they can change information.
What is the Disjunction of homologous chromosomes to the opposite poles?
During anaphase, the centrosomes (which have moved to opposite poles of the cell) release microtubules from their centrioles which then pull the chromosomes towards them, the double stranded chromosomes then split at the centromere and thus each pole of the chromosome has a copy of every chromosome. I assume you're talking about meiotic division though and in this case the spindle fibres/ microtubules dont split the chromosomes in half, rather, the chromosomes line up in homologous pairs (instead of in single file) and the spindle fibres pull one of the entire homologous double stranded chromosomes to its designated pole.
When do the homologous chromosomes form tetrads?
Bivalents or Tetrad of homologous chromosomes consisting of four synapsed chromatids that become visible during the Pachytene stage of meiotic prophase or A four-part structure that forms during the prophase of meiosis and consists of two homologous chromosomes, each composed of two sister chromatids.
What do homologus chromosomes do?
homologus chromosomes dont really DO anything. They contain the genes for the same traits though
What animal has the most chromosomes in the world?
i dont think so
How many homologous chromosomes interact with each other or dont during mitosis and meiosis?
In mitosis, the homologous chromosomes dont interact, but in meosis, they separate during Anaphase 1. In mitosis, the homologous chromosomes dont interact, but in meosis, they separate during Anaphase 1.
Is homologous chromosomes only present in cells that undergo meiosis?
Usually they dont as homologous chromosomes form bivalents with other homologous chromosomes and crossing over occurs between the 2. But if a chiasmata does form between the t homologous chromosomes they can change information.
What does disjunction mean?
inclusive : pvq : one or both have to be true exclusive : pV ( with a line under it but i dont know how to do that on my aptop) q :ony one coud be true
Do homologous chromosomes always have identical alleles?
no they don't necessarily have to have the same alleles but they have the same genes. Homozygous chromosomes would have the same allele for a particular gene and heterozygous chromosomes would have different alleles for a particular gene.
What is the Disjunction of homologous chromosomes to the opposite poles?
During anaphase, the centrosomes (which have moved to opposite poles of the cell) release microtubules from their centrioles which then pull the chromosomes towards them, the double stranded chromosomes then split at the centromere and thus each pole of the chromosome has a copy of every chromosome. I assume you're talking about meiotic division though and in this case the spindle fibres/ microtubules dont split the chromosomes in half, rather, the chromosomes line up in homologous pairs (instead of in single file) and the spindle fibres pull one of the entire homologous double stranded chromosomes to its designated pole.
How many chromatids are involved in crossing over of a homologous pair of chromosomes?
four two in each chromosome
When do the homologous chromosomes form tetrads?
Bivalents or Tetrad of homologous chromosomes consisting of four synapsed chromatids that become visible during the Pachytene stage of meiotic prophase or A four-part structure that forms during the prophase of meiosis and consists of two homologous chromosomes, each composed of two sister chromatids.
What do homologus chromosomes do?
homologus chromosomes dont really DO anything. They contain the genes for the same traits though
What animal has the most chromosomes in the world?
i dont think so
Jealous of partners best friend?
Dont be. Jealousy is Not good. seairiously.
What are two reasons to prove that chromosomes are important in inheritance?
Its,,,,,,, i dont know.
Does longitudinal splitting of chromosomes occur in mitosis?
i dont know, this is my question that i have no answer
