science definition of trait for fourth grade

A man's characteristics, such as height, colour of the eyes, intelligence, etc. are all inheritable. Often we see that the children of parents with blue eyes would get blue eyes; baldness passes on in the family from one generation to another; even disorders like diabetes and heart diseases are of..

Good height, high tillering and profuse branching are traits, desirable for fodder crops. Cereal crops should be short, for better productivity. Developing varieties with agronomic traits that are tailor-made will ensure higher yiel..

The genetic material that controls a characteristics or a trait is a nucleoprotein called chromatin. The chromatin material just before cell division forms into chromosomes. Each chromosome is made up of two longitudinal strands called the chromatids. The chromosomes are present in pai..

Gregor Mendel, an Austrian monk during 1850s was the first to carry out scientific studies on transmission of characteristics from the parent to the offspring. He selected garden peas as they showed many contrasting traits that were easy to track through the generations. Moreover, these ..

Question: What are phenotype and genotype? Answer: Phenotype refers to the externally exhibited trait whereas genotype refers to the traits developed by gene..

Question: What are homozygous and heterozygous plants? Answer: Homozygous plants are those with similar alleles for a trait. Heterozygous plants have different alleles for a trait..

This law explains how more than one trait is inherited. According to this law, when there are two pairs of alleles, all four alleles assert themselves independently and are inherited independentl..

Question: What are hybrids? How does one distinguish a monohybrid from a dihybrid cross? Answer: The plants produced as a result of cross between two different plants are called hybrids. Monohybrid cross is the cross between two organisms in which the inheritance of only one trait..

The offsprings are genetically identical and therefore advantageous traits can be preserved.The plants gradually lose their vigour as there is no genetic variation. They are more prone to diseases that are specific to the species. This can result in the destruction of an entire crop..

An important result of the reproductive cycle is production of similar featured individuals for generations. The transmission of characteristics through successive generations refers to heredity. These characteristics include all physical, physiological and psychological characteristics in organis..