Cattle have a gene that controls body type, which can be normal and loose. When crossing cattle with a loose physique

Cattle have a gene that controls body type, which can be normal and loose. When crossing cattle with a loose physique, splitting into animals with a loose and normal physique in a ratio of 2: 1 is constantly observed. If you cross between animals with a normal and loose physique, then in the offspring, splitting is observed in a 1: 1 ratio. From crossing animals with a normal physique, the same calves are born. Determine: 1) what are the features of inheritance of body type in cattle; 2) what offspring and in what ratio should be expected from crossing a diheterozygous hornless bull with the same cow.

1) The dominant gene for the body type in the homozygous state causes the death of organisms; 2) from crossing a diheterozygous hornless bull with the same cow, the following offspring can be expected: hornless loose physique, horny loose physique, hornless normal physique and horned normal physique in a ratio of 6: 2: 3: 1.

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