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Equatorial

Equatorial

(Science: astronomy) An instrument consisting of a telescope so mounted as to have two axes of motion at right angles to each other, one of them parallel to the axis of the earth, and each carrying a graduated circle, the one for measuring declination, and the other right ascension, or the hour angle, so that the telescope may be directed, even in the daytime, to any star or other object whose right ascension and declination are known. The motion in right ascension is sometimes communicated by clockwork, so as to keep the object constantly in the field of the telescope. Called also an equatorial telescope.

The term equatorial, or equatorial instrument, is sometimes applied to any astronomical instrument which has its principal axis of rotation parallel to the axis of the earth.


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Re: Mitosis and meiosis!

... Prophase I is different from Prophase in mitosis where there is crossing over occur. In Metaphase I, the homologous chromosomes are aligned at the equatorial line while metaphase in mitosis not. In Anaphase I, the homologous chromosomes are separated while sister chromatids are split at centromere ...

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by mavis
Wed Jan 30, 2013 9:00 am
 
Forum: Cell Biology
Topic: Mitosis and meiosis!
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Views: 4191

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... poles of the cell.. 3. Metaphase The spindle fibres attach themselves to the centromeres of the chromosomes and align the the chromosomes at the equatorial plate. 4. Anaphase The spindle fibres shorten and the centromere splits, separated sister chromatids are pulled along behind the centromeres. ...

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by HerrBiologie
Sun Oct 30, 2011 9:16 am
 
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Topic: MITOSIS PHASES QUESTION?
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by LeoPol
Wed Oct 05, 2011 7:17 am
 
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Topic: Theories - Origin of Life
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Re: Meiosis = extreme confusion. Please help!

... associated sister chromatids. Crossing-over can occur during the latter part of this stage. Metaphase 1: Homologous chromosomes align at the equatorial plate. Anaphase 1: Homologous pairs separate with sister chromatids remaining together. Telophase 1: Two daughter cells are formed with each ...

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by kyra13
Mon Aug 01, 2011 7:49 am
 
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Topic: Meiosis = extreme confusion. Please help!
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PLEASE HELP! Genetics HW: Hardy-Weinburg Question

... for me. :( Question: Sickle-cell anemia is coded for by the S allele (i.e., S codes for the dominant trait and s for the recessive). If 19% of an equatorial population is born with sickle-cell anemia (ss), what percentage of the population will be more resistant to malaria? What percentage of ...

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by laghmani786
Tue May 06, 2008 12:33 pm
 
Forum: Genetics
Topic: PLEASE HELP! Genetics HW: Hardy-Weinburg Question
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