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Zoology

Blazing goIITian

Joined:	3 Sep 2008
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21 Jan 2009 20:44:06 IST

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166

genetics

None

a gamete normally contains

all alleles of a gene

many alleles of a gene

two alleles of a gene

one alleles of a gene plz xplain

A cross b/w F1 hybrid n the recessive parent is called

dihybrid cross.

monohybrid cross

test cross

trihybrid cross xplain

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goiitian

Blazing goIITian

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21 Jan 2009 21:42:01 IST

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a gamete normally contains.......two alleles of a gene...take any book see a set of gene having two allels only( XX ) OR (XY)............2)A cross b/w F1 hybrid n the recessive parent is called.......test cross...ITS JUST TO TEST SO CALLED A TEST CROSS

JPS

Blazing goIITian

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21 Jan 2009 21:42:12 IST

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1.a gamete generally contains one allele of a gene. the other one is generally separated out during anaphase I where the non-homologous chromosomes separate out.2.test cross

Sahithya

Blazing goIITian

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21 Jan 2009 22:10:25 IST

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allele means what

JPS

Blazing goIITian

Joined: 21 Nov 2008

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21 Jan 2009 22:15:22 IST

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allele means one of the two pair of genes for a character. for example in case of tallness T and t are two alleles.

N.P. Singh

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Joined: 17 Dec 2008

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24 Jan 2009 16:27:44 IST

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Gamete is pure for a particular trait so it will have 1 allele of a gene ( allele is a pair of gene) this is explained in 2 nd law law of segegation so called law of purity of gametes

Cross is called test cross to check whether the parents are homozygous or heterozygous if all are of same type then homozy. if ratio is 50 50 then heterozygous

monika john

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Joined: 24 Jan 2009

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24 Jan 2009 17:06:57 IST

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allele itself is a pair of gene so 1 allele is present

cross between f1 generation and a reccesive parent is called Test Cross

Sahithya

Blazing goIITian

Joined: 3 Sep 2008

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30 Jan 2009 02:01:52 IST

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whta is recessive parent?is test cross n back cross are same

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