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Lots of questions of heredity

Genetics as it applies to evolution, molecular biology, and medical aspects.

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Lots of questions of heredity

Postby ripplebunny » Fri Oct 29, 2010 10:34 pm

Hello, twelve questions :( I answered the ones that I think I knew 8)

1. What is a particular phenotypic character. Refers to the physical appearance as opposed to the mode of appearance. For an example, blonde hair rather than hair color.

2. What is the position of a gene on a chromosome called?

3. What is any cross between an offspring and one of its parents.

4. What is the phenomenon of multiple effects by one gene? Polygeny.

5. What is a diagnostic cross involving breeding with a recessive with known genotype? Dihybrid

6. What is a chromosome that is not a sex chromosome? Somatic.

7. What is the study of the heritable changes that occur without involving changes in the DNA sequence?

8. What is the acquisition of characteristics by the transfer of genetic info from one generation to another?

9. What is the allele that expresses its characteristics only when it is in the homozygous combination?

10. What is the alleles for a gene where there are more than two alleles? Multiple alleles

11. What is an inheritance pattern in which both alleles in a heterozygous combination contribute to the phenotype? Collaboration

12. What is the term to describe genes that are located on the same chromosome? Homologue

These should all be one term :shock:
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Postby Julie5 » Sat Oct 30, 2010 12:36 pm

3.Incestuous!!!!
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Postby JackBean » Sun Oct 31, 2010 5:22 pm

Julie: I think they mean back-cross :-D :lol:

4. no, polygeny is one trait caused by several genes

5. I don't think so

6. yes

7. epigenetics

8. heredity? Probably not...

10. not sure, what you mean

11. I think there can be more, like codominance etc. (but not collaboration)

12. no
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
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Re: Lots of questions of heredity

Postby Jordanw21 » Mon Nov 08, 2010 5:43 pm

I'll just answer the ones that aren't answered yet.

1. Any description of a trait, such as green eyes (eye color), brown hair (hair color), tall stature (height), etc.
2. The position of a gene in the chromosome is it's locus (plural-locii).
3. An allele that's only expressed when in a homozygous position would be the recessive allele of a trait. If in a heterozygous position with the dominant allele, the dominant allele would mask the recessive allele and the dominant trait would be expressed.
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Postby JackBean » Tue Nov 09, 2010 10:35 am

Jordan:
1. I think he asks for some term

3. what? What does it has to do with back-cross?
http://www.biolib.cz/en/main/

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Re: Lots of questions of heredity

Postby Jordanw21 » Tue Nov 09, 2010 12:41 pm

Haha sorry.
What I referred to as #3, I meant for #9.
Sorry for the confusion.
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Postby silviya » Sun Dec 05, 2010 8:56 am

1. BLUE EYES
2.LOCUS
3.BACK CROSS
4.NO,Polygeny is a gene interaction in which a single characteristic may be controlled by more than one gene... the ans is PLEIOTROPY
6.YES
7.EPIGENETICS
8.HERIDITY i hope so... nt sure of it..... :D :)
10.S I HOPE SO :) :D :D ...
12.LINKED
Last edited by silviya on Tue Dec 07, 2010 8:58 am, edited 1 time in total.
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Postby magicsiew » Sun Dec 05, 2010 11:18 am

1. Trait

5. Testcross

9. Recessive

11. Codominance

12. Linkage
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Postby xenesis » Fri Dec 10, 2010 6:32 pm

hello. nice work. Thanks for sharing such useful information. Take care.
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Re: Lots of questions of heredity

Postby Blueberrysplash » Sun Dec 19, 2010 4:42 pm

Answer no. 6 can also be Autosome..
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