Question 5
Define and design a test − cross?
Answer
Test cross is a cross between an organism with unknown genotype and a recessive parent. It is used to determine whether the individual is homozygous or heterozygous for a trait.
If the progenies produced by a test cross show 50% dominant trait and 50% recessive trait, then the unknown individual is heterozygous for a trait. On the other hand, if the progeny produced shows dominant trait, then the unknown individual is homozygous for a trait.
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4 Comment(s) on this Question
Pradeep
2019-10-13 20:15:05
ððð
sanju sheikh
2017-01-14 16:12:33
If the unknown progeny is dominent 100 percent in cross ...then what is that cross called..
Nosib khan
2016-12-30 22:03:13
Thanks
sushil mishra
2016-08-03 21:58:46
its soo gud
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