Question

A disease man marries a normal woman. The couple has 3 daughters and 5 sons. The daughters are diseased while sons are normal. The gene of the disease is
A. Sex link inheritance
B. Sex linked dominance
C. Autosomal character
D. Sex linked Character.

Answer 1

Hint: Inheritance is that the process by which genetic information is passed on from parent to child. this is often why members of the identical family tend to own similar characteristics

Complete answer:
Genes that determine sex-linked dominant traits that are present on the sex chromosomes or allosomes. they're expressed even once they are present within the heterozygous condition. it's more common in females.
In the given case, the daddy is deceased. It states that father having sex chromosome which has the gene for the disease. Hence, a father can transfer X-chromosomes only to daughter. Therefore, the sex-linked dominant trait have only affect the daughter. The trait can appear within the progeny which are heterozygous. samples of diseases caused by sex-linked dominant genes are hypophosphatemic rickets, oral-facial-digital syndrome type I and fragile X syndrome.
Therefore from the above discussion , the correct answer is “Option A”.

Additional Information:
X-linked recessive inheritance could be a mode of inheritance during which a mutation during a gene on the X chromosome causes the phenotype to be always expressed in males (who are necessarily homozygous for the chromosomal mutation because they need one X and one Y chromosome) and in females who are homozygous for the chromosomal mutation, see zygosity. Inheritance of a selected disease, condition, or trait depends on the sort of chromosome that's affected. It will be either an autosomal chromosome or a chromosome. It also depends on whether the trait is dominant or recessive. Sex-linked diseases are inherited through one in all the sex chromosomes, which are the X and Y chromosomes.
Dominant inheritance occurs when an abnormal gene from one parent can cause a disease, while an identical gene from the opposite parent is normal. The abnormal gene dominates the gene pair.
There are 44 autosomes and a pair of sex chromosomes within the human genome, for a complete of 46 chromosomes (23 pairs). Sex chromosomes specify an organism's genetic sex. Humans can have two different sex chromosomes, one called X and also the other Y. Normal females possess two X chromosomes and normal males one X and one Y.

Note:
Human X and Y chromosomes determine the biological sex of an individual, with XX specifying female and XY specifying male. Although the Y chromosome contains atiny low region of similarity to the sex chromosome so they will pair during meiosis, the Y chromosome is way shorter and contains many fewer genes.