Technology of storage and primary processing of agricultural products

Issues to be solved independently
1. The red color of fragrant peas is due to two dominant complementary genes (A and B) . If none of them participate in the genotype, the red color will not develop and the peas will be white.
Determine the color of plant flowers in the following genotypes: a) Aavv; b) aaVV; v) AAVv; g) AaVv;
2. Determine the phenotype of F ₁ in the following confusion Consider that genes A and B are complementary (red): a) AAbb x aabb; b) AaVb x aaBb; v) AAbb x Aabb: g) AAbb x aaBB.
3. The redness of the flower petals of the fragrant pea plant occurs under the influence of two noallel dominants. The digetrozygous red-flowered pea was crossed with a white-flowered pea that was homozygous for two noalle genes. Determine the phenotype and genotype of the first generation formed.
4. A white cocoon of different genotypes mixed the butterflies of two mulberry silkworms to form a yellow cocoon in F ₁ hybrids. When their female and male butterflies were crossed , two different phenotypic classes were formed in F ₂ - yellow and white cocoon butterflies in a 9: 7 ratio. Identify the genotype of female and male, F ₁ and F ₂ hybrid mulberry silkworm butterflies involved in crossbreeding?
5. The disc-shaped shape of the squash fruit depends on the dominant genes A and B. If the genotype contains one of these two dominant genes, then the fruit is flange-shaped. The recessive genes of the two noalles ensure that the pumpkin fruit is elongated in the homozygous state. Find the genotype and phenotype of the hybrids formed from the interbreeding of forms with the following genotype: 1) AAvv x AaVv, 2) AAVv x aabb, 3) AaBb x aabb, 4) AABb x aaBb, 5) AaBB x Aabb

 

12- LABORATORY WORK.

Subject. Epistasis effect of genes

The purpose of the work. To study the causes of the emergence of a new trait when two non-allelic dominant genes or recessive genes fall into one genotype.