You have a plant with yellow seeds, which express a dominant phenotype. how would you determine the plant's genotype?

The test cross is a cross, which is performed to determine the genotype of a given organism. in this case, the individual is crossed with homozygous recessive organism

In case the plant is showing a dominant phenotype, then it can either be homozygous or heterozygous dominant. On crossing with homozygous recessive individual, the homozygous dominant individual produces all dominant offspring, whereas, the heterozygous dominant produces 50% dominant offspring and 50% recessive offspring. Hence, by observing the result of the test cross, one can determine the genotype of the plant.

advantage of using stem cells in medical research:

1.       it provides medical benefits in the fields of therapeutic cloning and regenerative medicine.

2. it provides great potential for discovering treatments and cures to a variety of diseases including parkinson disease, spinal cord injuries, diabetes, alzheimer’s disease and many more.

3. limbs and organ could be grown in lab from stem cells and then used in transplant or treat illness.

a- all cells come from pre-existing cells