Skip to main content

LATE PROPHASE 1

The homologous chromosomes appear to repel each other and partially separate. Each chromosome is now seen to be composed of two chromatids. The two chromosomes are joined at several points along their lengths. these points are called chiasmata. This occurs as a result of breakage and reunion between any two of the four strands present at each site. Thus resulting in the swaping of genes from one chromosomes (paternal) with genes from the other chromosomes (maternal)  leading to new gene combination in the resulting chromatids.

Comments

Popular posts from this blog

Physical classification of water

Hygroscopic water This is the water present in an air dry soil held tightly by soil solids at a suction pressure greater than 3.1 bar. This type of water cannot be removed by evapouration and roots of higher plants. Only microbial activities have been found to take place here.

Arboreal Habitat

Trunk of a Palm tree A variety of plants and animals live on and sometimes in a palm tree. The plants are epiphytes most of which live in humus and dusts which collects in the leaf bases of a palm tree. The animals are there because of these epiphytes or of the palm tree itself. A palm tree maybe divided into three regions, the crown, trunk and aerial parts of the roots. The common epiphytes found on palm trees are orchids (Diaphanthe, Bulbophyllum) figs, ferns, mosses. The animals found here are small animals like insects and spiders. You can get a soft copy of this book by sending me mail. ukponifueko@gmail.com.

Basic principles of food processing and preservation :easy notes

www.morebooks.de is the online bookstore for purchase of copies PRINCIPLES OF REFRIGERATION STORAGE LOW TEMPERATURE Refrigeration storage room require sufficient capacity/insulation to maintain temperature of + 1oC, it is important to note the numbers of doors and factors causing heat cut. Vegetables and fruits generate different levels of heat. They are stored at different temperatures. The low temperature must be maintained as much as possible. AIR CIRCULAÞION AND HUMIDITY CONTROL Air is required to remove heat from food surface. If the air is too moist there is surface condensation and mould growth, if the air is too dry, food may dry out. Each food has its own relative humidity and temperature. The best relative humidity is equivalent to the moisture in food. Fans are constructed in the refrigeration system in order to enhance air circulation, all the sections of the room receives the low temperature. The hygrometers are read and interpreted correctly to ensure...