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Science Clinic => Biology => Topic started by: james on Mar 26, 2020

Title: Below is a pedigree of a fairly common human hereditary trait in which the boxes represent males and ...
Post by: james on Mar 26, 2020

Question 1

If an X-linked disorder is lethal to the affected individual prior to the age at which one reaches reproductive maturation, the lethality will be expressed only in males. Why is this so?

Question 2

Below is a pedigree of a fairly common human hereditary trait in which the boxes represent males and the circles represent females. Shading symbolizes the abnormal phenotype.

Given that one gene pair is involved:
(a) Is the inheritance pattern X-linked or autosomal, recessive, or dominant?
(b) Give the genotype of each individual in the pedigree. If more than one genotypic possibility exists, present all possible alternatives.

Title: Below is a pedigree of a fairly common human hereditary trait in which the boxes represent males and ...
Post by: frankwu0507 on Mar 26, 2020

Answer 1

Heterozygous females who are "carriers" and do not express the disorder are the only source of the lethal allele in the population.

Answer 2

(a) autosomal recessive
(b)
Title: Re: Below is a pedigree of a fairly common human hereditary trait in which the boxes represent males
Post by: Franlo Meyer on Jun 10, 2021
thank you
Title: Re: Below is a pedigree of a fairly common human hereditary trait in which the boxes represent males
Post by: Hunter Lendt on Oct 18, 2021
thankyou