Which of the following conditions correctly d | vedclass

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

Question

(B) $1$. In birds,sex determination is of the $ZW-ZZ$ type,where $ZZ$ represents the male and $ZW$ represents the female. Thus,option $A$ is incorrect

Vedclass · Accepted Answer

In grasshoppers,the $XO$ type of sex chromosomes determines the male sex.

Vedclass · Answer

(B) $1$. In birds,sex determination is of the $ZW-ZZ$ type,where $ZZ$ represents the male and $ZW$ represents the female. Thus,option $A$ is incorrect.$2$. In grasshoppers,sex determination is of the $XO$ type. Males have only one $X$ chromosome $(XO)$,while females have two $(XX)$. Therefore,the presence of a single $X$ chromosome determines the male sex. Thus,option $B$ is correct.$3$. In humans,the $XO$ condition (Turner syndrome) results in a female phenotype,but these individuals are sterile. However,the standard mechanism for female sex determination in humans is the presence of $XX$ chromosomes. Option $C$ is partially correct in description but $B$ is the standard textbook example for $XO$ sex determination.$4$. In Drosophila,sex is determined by the ratio of $X$ chromosomes to autosomes. $XX$ individuals are female,not male. Thus,option $D$ is incorrect.

Which of the following conditions correctly describes the mechanism of sex determination?

Similar Questions

How is the sex of the offspring determined in humans?

What type of sex determination is observed in humans? Explain.

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

$A$ fruit fly is heterozygous for sex-linked genes and is mated with a normal female fruit fly. In what proportion will the male-specific chromosomes enter the egg cells (in $:1$)?

If the $X/A$ ratio of two Drosophila individuals is $0.6$ and $0.33$ respectively,what will be their sex?

Vedclass Test Series

Exam Paper Generator

Online Exam Module