Question

Какое потомство получится от скрещивания комолого, чёрного быка(гетерозиготного по обоим признакам) с рогатой красной коровой, если комолость и чёрная масть - доминантные признаки?

Answer 1

Аа    аа
F1Аа F2 Аа аа
доминантный безрогий
рецесивный комоолого

Answer 2

Crossbreeding a Homozygous Black Bull with a Horned Red Cow

When a homozygous black bull (homozygous for both polled and black coat color) is crossed with a horned red cow, the resulting offspring will depend on the genetic makeup of the parents. Let's analyze the possible outcomes based on the information provided.

Homozygous Black Bull (BB, PP): - The bull is homozygous for black coat color (BB) and homozygous for polled (without horns) trait (PP).

Horned Red Cow (bb, pp): - The cow is homozygous for red coat color (bb) and homozygous for horned trait (pp).

Since black coat color and polled trait are dominant, while red coat color and horned trait are recessive, the genotypes of the parents can be represented as follows:

- Bull: BBPP - Cow: bbpp

To determine the possible offspring, we need to consider the inheritance patterns of coat color and horned trait.

Coat Color Inheritance: - Black coat color (B) is dominant over red coat color (b).

Based on this, the possible coat color genotypes of the offspring are:

- Bb (black coat color) - Bb (black coat color)

Horned Trait Inheritance: - Polled (without horns) trait (P) is dominant over horned trait (p).

Based on this, the possible horned trait genotypes of the offspring are:

- Pp (polled) - Pp (polled)

Therefore, the potential offspring from the crossbreeding of a homozygous black bull with a horned red cow would be black-coated and polled, with the genotypes BbPp.

Please note that this is a simplified explanation based on the information provided. In reality, there may be other genetic factors and variations that could influence the outcome. It is always recommended to consult with a professional in animal genetics for more accurate predictions.