IS HYBRID A homozygous for the traait or height ...please explain?

Answer 1

Your question is a little unclear.

A hybrid is an organism whose parents are of different species. It's not always fertile (called hybrid breakdown - it can't reproduce). Sometimes they die in utero (before birth) or soon after.

Homozygous is a state characterizing the genetics of an organism. Chromosomes contain various genes: genes for eye color, height, curly/straight hair, etc. There are variations of these genes, called alleles: you may have an allele for brown eyes of the allele for blue eyes.
If you're homozygous, that means you have two alleles of the same type - that is, two alleles for blue eyes. People have two alleles for one gene because each of our cells have two copies of the chromosome set: one from the mother and one from the father (this is generally true for sexually reproducing organisms).
If you have different alleles, you're said to be heterozygous at that allele.

Answer 2

A hybrid would be uniform for height, meaning that a cross from two pure lines would produce homogeneous (all identical), heterozygous offspring ( hybrid corn). The plant itself would be uniformly heterozygous across all loci except the loci in common, which, for a commonly adapted group can be around 70-80%. If the parents were not pure lines ie. heterozygous there would be segregation in the hybrids and the trait would be heterogeneous and a mix of hetero and homozygotes. An example of that is humans...It is partially why you are different from your brother or sister.

Answer 3

"In biology, hybrid has two meanings.
The first meaning is the result of interbreeding between two animals or plants of different taxa. Hybrids between different species within the same genus are sometimes known as interspecific hybrids or crosses. Hybrids between different sub-species within a species are known as intra-specific hybrids. Hybrids between different genera are sometimes known as intergeneric hybrids. Extremely rare interfamilial hybrids have been known to occur (such as the guineafowl hybrids).
The second type of "hybrid" are crosses between populations, breeds or cultivars within a single species. This second meaning is often used in plant and animal breeding. In plant and animal breeding, hybrids are commonly produced and selected because they have desirable characteristics not found or inconsistently present in the parent individuals or populations. This rearranging of the genetic material between populations or races is often called hybridization." (http://en.wikipedia.org/wiki/Hybrid)

Thus, in the second meaning of the term, the hybrid would be the offspring of a cross between two parents (of the same species) with different traits (each of which was homozygous), so the offspring would be heterozygous for the trait.