Question

У кішок руде забарвлення домінує над чорним, гетерозиготи мають черепахове забарвлення. Ген забарвлення зчеплення із статтю ( Х-хромосома). Якими будуть нащадки, якщо кіт рудий, а кішка чорна. (за генотипом та фенотипом) Допоможіть будь ласка!!!!!!!​

Answer 1

Решение в прикрепленной фотографии.

Помним, что определение пола у кошек ХХ (самки) - ХУ (самцы), как у человека

Answer 2

Understanding Cat Coat Color Inheritance

When it comes to understanding the inheritance of coat color in cats, it's essential to consider the genetic principles at play. In this case, we're dealing with the dominance of red (ginger) color over black, as well as the presence of tortoiseshell (calico) coloration in heterozygous individuals.

Genotype and Phenotype of Offspring

If a male cat is ginger (carrying the genotype for red coloration) and a female cat is black, we can predict the genotype and phenotype of their offspring based on the principles of inheritance.

Genotype: - The male cat's genotype for coat color is likely to be X^OY, where X^O represents the allele for orange color and Y represents the Y chromosome. - The female cat's genotype for coat color is likely to be X^BX^b, where X^B represents the allele for black color and X^b represents the allele for non-black color.

Phenotype: - The male cat's phenotype is ginger (red). - The female cat's phenotype is black.

Inheritance of Coat Color

In cats, the gene for coat color is located on the X chromosome. The gene for red coloration (O) is dominant over the gene for non-red coloration (o). Meanwhile, the gene for black coloration (B) is dominant over the gene for non-black coloration (b).

When predicting the offspring's genotypes and phenotypes, we need to consider the inheritance patterns based on the parents' genotypes.

Predicting the Offspring's Genotypes and Phenotypes

Since the male cat is ginger (X^OY) and the female cat is black (X^BX^b), we can predict the genotypes and phenotypes of their offspring using Punnett squares.

The possible genotypes and phenotypes of the offspring are as follows:

Genotypes: - Male offspring: X^OY (ginger) - Female offspring: X^BX^b (black)

Phenotypes: - Male offspring: Ginger (red) - Female offspring: Black

Based on the principles of X-linked inheritance and the dominance of red over non-red coloration, the male offspring are expected to be ginger, while the female offspring are expected to be black.

This prediction aligns with the genetic principles governing coat color inheritance in cats.

I hope this helps clarify the inheritance of coat color in cats! If you have any more questions or need further assistance, feel free to ask!