Horniness in sheep is a sex-dependent sign. In sheep, the H gene determines the development of horns, the H ‘gene – the absence of horns

Horniness in sheep is a sex-dependent sign. In sheep, the H gene determines the development of horns, the H ‘gene – the absence of horns. Males with genotypes HH and HH ‘are horned. Having the HH genotype, females can be horned, and heterozygous females – hornless.
1) What genotype can animals have:
a) horned ram;
b) a hornless ram;
c) horned sheep;
d) a hornless sheep?
2) What offspring can be expected from the following crosses:
a) (women) НН’ХХ х (husband) H’H’XY;
b) (women) ННХХ х (husband) HH’XY?

1) a) HHXY, HH’XY; c) NHXX;
b) H’H’XY; d) NN’XX, N’N’XX.
2) a) in F1 hornless females, hornless males and horned males in a ratio of 2: 1: 1;
b) in F1, horned females and males in a 1: 1 ratio.

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