How can Jesus be from the descendent of David if he had no father?

How can Jesus be from the descendent of David if he had no father?

Concerning his Son Jesus Christ our Lord, which was made of the seed of David according to the flesh; (Romans 1:3 )

Here we read Jesus was the direct descendant of David how's that possible if he had no father??

The Greek text literally means sperm seed (oσπέρματος spermatos)

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Further we read he was referred as the son of David?

This is the genealogy of Jesus the Messiah the son of David, the son of Abraham:

(Matthew 1:1)

He called out, "Jesus, Son of David, have mercy on me!"

(Luke 18:38)

We know through medical science male and female carry chromosome which contains hundreds to thousands of genes. Females carry X chromosome and males carry Y chromosome.

For example, when Y chromosome is released from the male and meets the X chromosome then the child born will be a male, and if the X chromosome is released from the male the only other chromosome it will meet is X because the female doesn't carry Y thus, the child will be born as a female.

How could Jesus be the descendent of David if there was no DNA passed? The Y chromosome is only passed on through a male hence, it is impossible for Jesus to be connected as a descended of David as there is no links.

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This only concludes the Jesus you all portray was not born from a Virgin?? And even worse Mary whom they call virgin after having Jesus has more childrens from her spouse josepth, So why call her Virgin??

Isn't this the carpenter? Isn't this Mary's son and the brother of James, Joseph, Judas and Simon? Aren't his sisters here with us?" And they took offense at him.

(Mark 6:3)