X linked dominant inheritance | Y linked inheritance | class 12 скачать в хорошем качестве

X linked dominant inheritance | Y linked inheritance | class 12

Aslam o alikum I am Hassam ur Rahman and I am teaching Fsc biology since 2014 .I am always trying to improve myself and provide best lecture to students.i am taking content for the lecture from authentic and relevant sources but human errors are possible . you are requested to please highlight the mistakes.My lectures are equally reliable for Fsc and mdcat students #visiblescience #mdcatbiology #alevelbiology #neetbiology #fscbiology My personal channel, I am sure it will change your life and very beneficial for you https://youtube.com/@hassamurRahman?f... My Facebook page link https://www.facebook.com/hassam.urahm... This lecture is about X - linked dominant inheritance : Pattern of X - linked dominant inheritance is diferent from X - linked recessive. It is more common in females than males. All daughters of an afected father, but none of his sons are afected. Any heterozygous afected mother will pass the trait equally to half of her sons and half of her daughters (Fig. 22.29). Hypophosphatemic rickets is an X - linked dominant trait. It is a rare hereditary disease. It is diferent from common dietary rickets, which could be cured by taking vitamin D. It does not result from vitamin D deiciency but its cause is a genetic communication failure at molecular level. The genes encoding bone proteins never receive vitamin D’s message to function. Y - Linked inheritance : Pattern of Y - linked inheritance is very peculiar. Maleness is a Y - linked trait. Y - linked trait passes through Y - chromosome from father to son only. Such traits cannot pass to daughters because they do not inherit Y - chromosome. All sons of an afected father are afected by a Y - linked trait (Fig. 22.30). SRY’ gene on Y chromosome determines maleness in man. It is male sex switch which triggers developmental process towards maleness after 6 week pregnancy.