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Milk secretion and beard growth, both the traits are
Sex limited
Sex linked
Sex influenced
Autosomal traits
Solution
Milk secreting and baldness both trait belongs to the sex limited trait.
Finalization of sex at the time of fertilization is known as sex determination. All sex linked character show criss-cross inheritance and firstly it was studied and discovered by TH Morgan $(1910).$ Sex related trait may be divided into three types
$(i)$ Sex Linked Traits They are those traits the determining genes of which are found on the sex chromosomes. All the sex-linked traits present on a sex chromosome are inherited together
$(ii)$ Sex Limited Traits They are autosomal traits which are expressed in a particular sex in response to sex hormones although their genes also occur in the other sex, $e.g.,$ milk secretion in mammalian females, pattern baldness in males. The gene for beard behaves as an autosomal dominant in males and autosomal recessive in females
$(iii)$ Sex Influenced Traits The traits are not due to particular genes but are by products of sex hormones, $e.g.,$ low pitched voice, body hair. In males, pattern baldness is related to both autosomal genes as well as excessive secretion of testosterone
Similar Questions
In Drosophila, the allele for a normal grey body colour $G$ is dominant to ebony body $g.$ The following table summarises the results of several crosses
| S.No | Cross | Result |
| $I.$ | Strain $1 \times$ gg | All wild type |
| $II.$ | Strain $2 \times$ gg |
$1$ wild type $:\;1$ ebony |
| $III.$ | Strain $3 \times$ gg | All ebony |
| $IV.$ | Strain $4 \times$ Gg |
$3$ wild type $:\,1$ ebony |
Which strains both have the genotype Gg?
