Question

У свиней черная окраска щетины доминирует над рыжей,а длинная щетина-над короткой.определите генотипы и фенотипы гибридного потомства, если скрещиваются черное длиннощетиновое ,гетерозиготное по первому аллелю,с черным гетерозиготным короткощетиновым.

Answer 1

Решение задачи в приложении ниже

Answer 2

Genotype and Phenotype of the Hybrid Offspring in Pig Crossbreeding

When black color dominates over red color in the bristles of pigs, and long bristles dominate over short bristles, we can determine the genotypes and phenotypes of the hybrid offspring resulting from the crossbreeding of a black, long-haired heterozygote with a black, short-haired heterozygote.

To determine the genotypes and phenotypes, we need to understand the inheritance patterns of these traits.

1. Inheritance of Color: - Black color (B) is dominant over red color (b). - The black, long-haired pig is heterozygous for color (Bb). - The black, short-haired pig is also heterozygous for color (Bb).

2. Inheritance of Hair Length: - Long hair (L) is dominant over short hair (l). - The black, long-haired pig is also heterozygous for hair length (Ll). - The black, short-haired pig is also heterozygous for hair length (Ll).

Now, let's determine the possible genotypes and phenotypes of the hybrid offspring:

1. Genotypes: - The black, long-haired pig's genotype is BbLl. - The black, short-haired pig's genotype is BbLl.

2. Phenotypes: - The black, long-haired pig's phenotype is black color with long hair. - The black, short-haired pig's phenotype is black color with short hair.

When these two pigs are crossed, the possible genotypes and phenotypes of the hybrid offspring can be determined using a Punnett square:

        |  BbLl  |  BbLl  |
------- | ------ | ------ |
BbLl    |  BBLL  |  BBll  |
BbLl    |  BBLL  |  BBll  |

From the Punnett square, we can see that the possible genotypes of the hybrid offspring are BBLL, BBll, BbLL, and Bbll.

The corresponding phenotypes are as follows: - BBLL: Black color with long hair - BBll: Black color with short hair - BbLL: Black color with long hair - Bbll: Black color with short hair

Therefore, the genotypes and phenotypes of the hybrid offspring resulting from the crossbreeding of a black, long-haired heterozygote with a black, short-haired heterozygote are as described above.

Please let me know if there is anything else I can help you with!