A parent organism of unknown genotype is mated in a test cross. Half of the offspring have the same phenotype as the parent. What can be concluded from this result?
A. The parent is homozygous dominant for the trait.
B. The trait being inherited is polygenic.
C. The parent is heterozygous for the trait.
D. The parent is homozygous recessive for the trait.

Question

Knippel536 Knippel536

04-05-2015
Biology

Answered

A parent organism of unknown genotype is mated in a test cross. Half of the offspring have the same phenotype as the parent. What can be concluded from this result?
A. The parent is homozygous dominant for the trait.
B. The trait being inherited is polygenic.
C. The parent is heterozygous for the trait.
D. The parent is homozygous recessive for the trait.

Answer :

Other Questions

log3(2x-5)=2 Answer is 41/2. Why?

add and simplify 9/16=1/2=?

(−2x0y3 )(4x2y4 )+(2y5 )(3xy)2

Alex built a snowman using three snowballs,one small, one medium and one large, with diameters in the ratio 2:3:5. Although highly unlikely due to the phys

add and simplify 9/16=1/2=?

(−2x0y3 )(4x2y4 )+(2y5 )(3xy)2

Why are some examples of a chemical reaction not actually foolproof evidence that of a chemical reaction?13, 8th grade, and I'm doing my science lab report: The

Alex built a snowman using three snowballs,one small, one medium and one large, with diameters in the ratio 2:3:5. Although highly unlikely due to the phys

who was the first president of the united states of america

log3(2x-5)=2 Answer is 41/2. Why?

lulu1991 lulu1991 · Answer 1 · 2015-05-04T23:02:09-04:00

The answer is C. The test cross means that the unknown genotype organism is mated with a homozygous recessive organism("aa"). If the parent organism is homozygous("AA" or "aa"), the offspring will all be the same with the parent(Aa when the parent is "AA". "aa" when the parent is "aa"). So the half of the offspring have the same phenotype means the parent organism is heterozygous. We cannot confirm whether this is polygenic or not by test cross.