In maize, the genes that determine the color and shape of seeds are located on one chromosome. When a maize plant with smooth colored seeds was crossed with a plant that had wrinkled uncolored seeds, all F1 plants had smooth and colored seeds. Analyzing crosses of F1 hybrids yielded 4152 plants with smooth colored seeds, 149 with wrinkled colored seeds, 152 with smooth uncolored seeds and 4166 with wrinkled uncolored seeds. Determine: 1) which features are dominant; 2) genes for the shape and color of seeds are in the cis or trans position; 3) the distance between these genes.
1) Dominant traits – smooth and colored seeds, recessive – wrinkled and uncolored seeds;
2) the genes are in the cis position;
3) the distance between genes is 4.84 morganids (4.84% crossing over).
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.