Question

compare and contrast the following items:
a. dominant and recessive
b. genotype and phenotype
c. homozygous and heterozygous
d. monohybrid cross and test cross
e. dihybrid cross and trihybrid cross

there is no more. just have to compare a) to eachother, b) to eachother and so forth

Answer 1

a) Dominant versus Recessive

Each gene consists of two alleles: one comes from father and another from the mother. In which dominant, means they ultimately determine the expression of a trait. Whereas recessive ones are much less likely to be expressed. When a dominant allele is crossed with a recessive allele, the dominant allele determines the characteristic.

Dominant versus Recessive comparison

	Dominant	Recessive
Documented	Uppercase Letter (T)	Lower Case Letter (t)
Example	Brown eyes trait, A and B blood type	Blue eyes trait, O blood type

b) Genotype versus Phenotype

The genotype is the genetic code in the cell of an organism. This genetic constitution of an individual influences many of its traits. The phenotype is the expressed or visible traits, such as hair color. The phenotype depends on the genotype.

Genotype versus Phenotype comparison

	Genotype	Phenotype
Examples	DNA, susceptibility to diseases	Hair color, eye color, weight,
Depends upon	The hereditary information from their parents.	Depends on genotype and sometimes the influence of the environment.
Inheritance	can be inherited.	Cannot be inherited.

c) Heterozygous vs. Homozygous

Homozygous refers to two copies of the same allele, such as two dominant/recessive alleles. Heterozygous refers to one of each type of allele, one dominant and one recessive.

Heterozygous Homozygous Example Hh HH (homozygous dominant) or hh (homozygous recessive)

d) Monohybrid Cross vs. Test cross

In monohybrid cross of two breeding parents, each parent contributes one type of allele which results with the same genotype in all of the offspring . A test cross is a way to determine if an organism expresses heterozygote or a homozygote dominant trait by crossing it with an individual of a known genotype.

e) Dihybrid Cross vs. Trihybrid Cross:

In dihybrid cross, only two hybrid traits are crossed. However, in trihybrid cross, three hybrid traits are crossed.