In pea plants, the allele for tall (T) is dominant to the allele for short (t). Which of the following is the percent of offspring that will be tall if a heterozygous plant (Tt) is crossed with a homozygous tall plant?
A. 100%
B. 75%
C. 50%
D. 25%
i think its A because Genotype: If T is dominant to t, and a homozygous TT plant is crossed with a heterzygous plant (Tt), then each of the offspring produced by the homozygous dominant parent plant will have to contain a T.
Phenotype: Any individual with a T will be tall.
Which of the following describes the classification of humans?
A. The genus and the species sapiens
B. The phyla and the species sapiens
C. The family sapiens and the genus
D. The class sapiens and the genus
im lost on this one but i think its A
For the first question, you are correct. The percent of offspring that will be tall when a heterozygous plant (Tt) is crossed with a homozygous tall plant (TT) can be determined by using Punnett squares.
When a cross is made between a heterozygous plant (Tt) and a homozygous tall plant (TT), the possible genotypes of the offspring are Tt and TT. However, since the allele for tall (T) is dominant to the allele for short (t), any individual with at least one T allele will be tall.
Therefore, all of the offspring in this cross will have at least one T allele, resulting in a 100% chance of being tall. So, option A is correct.
For the second question, the classification of humans can be determined by using the system of taxonomy. The correct classification for humans is:
A. The genus and the species sapiens
According to taxonomy, organisms are classified into different hierarchical levels, starting from the largest and most inclusive group (domain) to the smallest and most specific group (species).
In this case, humans belong to the genus , which is a group that includes other species such as neanderthalensis (Neanderthals). The specific species of humans is Homo sapiens. Therefore, option A is the correct classification.