Question

A hybrid where the cytoplasm of two parent cells are fused by retaining only one parent nucleus is called

Answer 1

Hint: Sometimes a cybrid cell is produced when the nuclei of one parent get eliminated during developmental stages and only the cytoplasm of two cells fuse containing the nucleus of only one parent. Symmetric somatic hybrids are those which retain the full somatic complements of parental species.

Step by step answer:A hybrid where the cytoplasm of two parent cells are fused by retaining only one parent nucleus is called cybrid. A cytoplasmic hybrid (or cybrid, a portmanteau of the two words) is a eukaryotic cell line produced by the fusion of a whole cell with a cytoplast. Cytoplasts are enucleated cells. Cybrids are valuable in mitochondrial research and have been used to provide suggestive evidence of mitochondrial involvement in Alzheimer's disease, Parkinson's disease, and other conditions. A cybrid may be kept for a maximum of two weeks. owing to the development of the brain and spinal cord, after which time the cybrid must be destroyed. During the two-week period, stem cells may be harvested from the cybrid, for research or medical purposes. Under no circumstances may a cybrid be implanted into a human uterus.
A special case of cybrid formation involves the use of rho-zero cells as the whole cell partner in the
fusion. Rho-zero cells are cells that have been depleted of their own mitochondrial DNA by prolonged
incubation with ethidium bromide, a chemical that inhibits mitochondrial DNA replication. The rho-zero cells do retain mitochondria and can grow in a rich culture medium with certain supplements. They do retain their own nuclear genome. A cybrid is then a hybrid cell that mixes the nuclear genes from one cell with the mitochondrial genes from another cell.

Note: Cybrids are cells or plants containing nuclei of one species but cytoplasm from both the parental species. Cybridization production of somatic cybrids. The process of protoplast fusion resulting in the development of cybrid is known as cybridization.