Two parents, each with tt gene alleles, are true breeding and are crossed. which alleles will their offspring have? a. tt b. tt c. tt d. tt

The correct answer is option D. TT.

Explanation:

Homozygous condition is where both of the alleles are the same and express the character if present together. The homozygous condition can be dominant or recessive accordingly.

In this case of Both having TT is the dominant case of homozygous alleles. The offspring of two parents with homozygous dominant. Every parent produce gamete T and the cross between them is -  

    T         T  

T    TT     TT

T    TT     TT

Thus, the correct answer is option D.b TT

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.