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Egg coat

Egg coat

a layer of glycoproteins and other stuff which surrounds an egg (ovum), just outside of the eggs cell membrane. The coat protects the egg, and for organisms which practice external fertilization (fertilization outside of the parents bodies) it can help prevent the sperm of other species from entering the egg. For the eggs of mammals, the egg coat is called the zona pellucida and for sea urchins (a popular study organism for developmental biologists) it is called the vitelline layer.


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I need help with this Bio genetics problem. X-linked traits?

In cats, coat color is an X-linked trait where a black coat is determined by the XB allele and a yellow coat by the Xb allele. Black and yellow are co-dominant and a heterozygote has a tortoiseshell coat. a) A yellow female cat ...

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by MellowFellow231
Sun Oct 13, 2013 2:26 am
 
Forum: Genetics
Topic: I need help with this Bio genetics problem. X-linked traits?
Replies: 1
Views: 1299

Re:

... have enough of such genes to actually sustain translation independently. do ribosomal proteins define life???? if so, then viruses with protein coat would become living and prions too.And all other protein particles too would be living isn't it??? Life can grow, respond to the environment, reproduce, ...

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by wildfunguy
Tue Oct 01, 2013 2:04 pm
 
Forum: Microbiology
Topic: Living or not? (viruses,viroids and prions).
Replies: 15
Views: 11265

Living or not? (viruses,viroids and prions).

... its proteins itself, my question is why does it need ribosomal proteins??? do ribosomal proteins define life???? if so, then viruses with protein coat would become living and prions too.And all other protein particles too would be living isn't it???

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by Sumanth001
Mon Sep 30, 2013 12:54 pm
 
Forum: Microbiology
Topic: Living or not? (viruses,viroids and prions).
Replies: 15
Views: 11265

Antibody Coating

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by Helics
Fri Aug 02, 2013 7:56 pm
 
Forum: Microbiology
Topic: Antibody Coating
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by ashanair70
Tue Feb 12, 2013 8:47 pm
 
Forum: Genetics
Topic: Genetics question
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Views: 1204
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