Question

Помогите срочноо пожалуйста . у мышей длинные уши наследуются как доминантный признак а короткие как рецессивный.скрестили самца и самку с длинными ушами . в результате скрещивания получилось 1/4 части потомства с короткими ушами и 3/4 с длинными . определите генотип самца и самки С решением

Answer 1

Потомство аа Аа Аа АА
Гаметы А а А а
Родители Аа Аа
При скрещивании гетерозиготных особей расщепление в потомсве 3:1 по фенотипу и 1:2:1 по генотипу(второй закон Менделя)

Answer 2

Inheritance of Ear Length in Mice

When it comes to the inheritance of ear length in mice, the information provided suggests that long ears are inherited as a dominant trait, while short ears are inherited as a recessive trait. Let's analyze the given information to determine the genotypes of the male and female mice involved in the cross.

According to the given information, a male mouse with long ears (genotype unknown) was crossed with a female mouse with long ears (genotype unknown). The resulting offspring consisted of 1/4 with short ears and 3/4 with long ears.

To determine the genotypes of the male and female mice, we can use Punnett squares to represent the possible combinations of their alleles.

Let's assume that the dominant allele for long ears is represented by "L" and the recessive allele for short ears is represented by "l".

Genotype of the Male Mouse (Father)

Since the male mouse has long ears and the offspring ratio is 1/4 short ears to 3/4 long ears, we can deduce that the male mouse must be heterozygous for the trait. This means that the male mouse has one dominant allele (L) and one recessive allele (l).

Therefore, the genotype of the male mouse can be represented as Ll.

Genotype of the Female Mouse (Mother)

Since the female mouse also has long ears and the offspring ratio is 1/4 short ears to 3/4 long ears, we can deduce that the female mouse must also be heterozygous for the trait. This means that the female mouse has one dominant allele (L) and one recessive allele (l).

Therefore, the genotype of the female mouse can also be represented as Ll.

To summarize: - The genotype of the male mouse is Ll. - The genotype of the female mouse is Ll.

Please note that this is a hypothetical analysis based on the given information. The actual genotypes of the mice can only