A recessive gene located on the X-chromosome | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) In humans,males are hemizygous for the $X$-chromosome because they possess only one $X$-chromosome $(XY)$.If a recessive gene is present on the $X

Vedclass · Accepted Answer

Expressed in males.

Vedclass · Answer

(D) In humans,males are hemizygous for the $X$-chromosome because they possess only one $X$-chromosome $(XY)$.If a recessive gene is present on the $X$-chromosome of a male,there is no corresponding allele on the $Y$-chromosome to mask its effect.Therefore,the recessive trait will always be expressed in males.In contrast,females have two $X$-chromosomes $(XX)$,so a recessive gene on one $X$-chromosome is usually masked by the dominant allele on the other $X$-chromosome,unless the female is homozygous recessive.

$A$ recessive gene located on the $X$-chromosome of a human is always.....

Similar Questions

If the ratio between $X$-chromosomes and the complete set of autosomes is $0.5$,then the individual will be:

Male heterogamety,which is essential for sex determination in new offspring,is observed in which of the following?

The following diagram shows sex determination in honeybees. How many chromosomes do $P, Q,$ and $R$ have?
$\quad\quad P \quad Q \quad R$

Example$(s)$ of environmental determination of sex is/are:

$(a)$ In humans,males are heterogametic and females are homogametic. Explain. Are there any examples where males are homogametic and females heterogametic?
$(b)$ Also describe as to who determines the sex of an unborn child? Mention whether temperature has a role in sex determination.

Vedclass Test Series

Exam Paper Generator

Online Exam Module