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A variant of the term test cross, which refers to the cross made between an organism with unknown genotype and a recessive homozygote



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I need help with Punnett Square

... 0.1228 1.007 Total 10103 I did until here but, next questions are tough .... What was the phenotypic ratio for the offspring resulting from this testcross? Based on this phenotypic ratio, determine whether the F1 wild-type female was double homozygous or double heterozygous for the eye color ...

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by Yokie83
Sun Sep 29, 2013 9:21 pm
Forum: Genetics
Topic: I need help with Punnett Square
Replies: 1
Views: 4733


F1 progeny is in the left, The BB is a testcross. M1 and M2 are probes that attached to DNA fragments which was cut by restriction enzyme. The bottom table shows the gel-electropohresis analyse. The table gametes shows the 4 possible gametes ...

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by dreamtim
Wed Oct 10, 2012 8:56 pm
Forum: Genetics
Topic: RFLPs
Replies: 3
Views: 2049

Lots of questions of heredity

1. Trait 5. Testcross 9. Recessive 11. Codominance 12. Linkage

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by magicsiew
Sun Dec 05, 2010 11:18 am
Forum: Genetics
Topic: Lots of questions of heredity
Replies: 9
Views: 14293

Biology HW help

... phenotype (but of unknown genotype) and a homozygous recessive individual called ? 1. an F1 cross 2. a hybrid cross 3. a dihybrid cross 4. a testcross (X) 5. a self-cross Save Answer 8. Week 7 Q. 8 (Points: 5) In cattle, roan coat color (mixed red and white hairs) occurs in the heterozygous ...

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by sharingan23
Fri Feb 26, 2010 9:09 am
Forum: Genetics
Topic: Biology HW help
Replies: 1
Views: 15122

Trisomy Help

A homozygous recessive mutant was crossed to trisomics of two different chromosomes. A testcross of the trisomy F1 to the recessive homozygote gave 42 wild- type and 38 mutant progeny for chromosome 5, and 56 wild-type and 12 mutant progeny for chromosome 6. On which ...

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by LinuxPoser
Thu Feb 25, 2010 1:27 am
Forum: Genetics
Topic: Trisomy Help
Replies: 1
Views: 1023
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