In bugs and cockroaches, the sex determinatio | vedclass

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Question

$XX$ and $XO$ chromosome.

$XY$ and $XY$ type sex determination seen in many insect and mammals including humans. Males have $X$ and $Y$ chromosome

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$XX$ and $XO$ chromosomes

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$XX$ and $XO$ chromosome.

$XY$ and $XY$ type sex determination seen in many insect and mammals including humans. Males have $X$ and $Y$ chromosome along with autosome and females have pair of ' $X$ ' chromosome along with autosome

Parents Phenotypes Male Female

Genotypes $44 A + XY 44 A + XX$

Gametes $22 A + X 22 A + Y 22 A + A 22 A + X$

$22 A + X 22 A + X$

Children $22 A + X 44 A + XX 44 A + XY$ Female

$22 A + Y 44 A + XY 44 A + XY 	ext { Male }$

Sex ratio Female : Male = $1: 1$

In plants The flowering plants are mostly bisexual and lack sex chromosomes. The unisexual flowering plants tent to have $XX-XY$ type of sex chromosomal mechanism for sex determination. The female plants are $XX$ and male plants are $XY.$

$XX$ and $XO$ Type of Sex Determination

Found in insect like grasshopper, cockroaches and bugs. Males have only $X$ sex-chromosome and autosomes, female have pair of $X$ chromosome and autosome

Parents Phenotypes Male Female

Genotypes $A A+X O\; A A+X X$

Gametes $A+X, A+O\; A+X, A+Y$

$F_{1}$-generation

$XX-XO$ type of sex determination

Column $I$	Column $II$
$(a)\; XX-XO$ method of sex determination	$(i)$ Turner's syndrome
$(b)\; XX-XY$ method of sex determination	$(ii)$ Female heterogametic
$(c)$ Karyotype$-45 $	$(iii)$ Grasshopper
$(d)\; ZW-ZZ$ method of sex determination	$(iv)$ Female homogametic

In bugs and cockroaches, the sex determination takes place by

Similar Questions

Assertion : In humans, the gamete contributed by the male determines whether the child produced will be male or female.

Reason : Sex in humans is a polygenic trait depending upon a cumulative effect of some genes on $X-$ chromosome and some on $Y-$ chromosome.

Heterogametic male condition does not occur in

Sex of a human child is determined by

Two different types of gametes in terms of the sex chromosomes, are produced by