Question

In cattle, the presence or absence of scurs follows a sex-influenced pattern of inheritance. A heterozygous male has _______ and a heterozygous female has ______

Answer 1

In cattle, scurs inheritance is sex-influenced, with a heterozygous male typically expressing scurs while a heterozygous female may not.

Step-by-step explanation:

In cattle, the presence or absence of scurs, or horn-like growths, is a sex-influenced trait, which means that gender can influence the expression of that trait in a heterozygous individual. For this type of inheritance pattern, one sex may express the phenotype differently than the other sex despite having the same genotype. If 'S' represents the allele for scurs and 's' represents the allele for no scurs, the heterozygous genotype would be 'Ss'. Typically, in such sex-influenced traits, males and females might display the traits differently.

Although the exact nature of the alleles for scurs in cattle is not given, such traits often result in males expressing the dominant form of the trait while females may not. Thus, a heterozygous male might present with scurs while a heterozygous female might not, showing a sex-influenced pattern of scurs in cattle.