A male human is heterozygous for autosomal ge | vedclass

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(C) The genotype of the male is $AaBbX^hY$. Since genes $A$ and $B$ are autosomal and heterozygous,they will segregate independently during meiosis. T

Vedclass · Accepted Answer

$\frac{1}{8}$

Vedclass · Answer

(C) The genotype of the male is $AaBbX^hY$. Since genes $A$ and $B$ are autosomal and heterozygous,they will segregate independently during meiosis. The gene $h$ is $X$-linked. The possible gametes formed by this male are determined by the combination of alleles: $1$. Autosomal alleles: $A, a, B, b$ can form four combinations: $AB, Ab, aB, ab$ (each with a probability of $\frac{1}{4}$). $2$. Sex chromosomes: $X^h$ and $Y$ (each with a probability of $\frac{1}{2}$). To obtain a sperm with the genotype $abh$,the combination must be $ab$ from the autosomes and $h$ from the sex chromosome (specifically $X^h$). Probability of $ab = \frac{1}{2} 	imes \frac{1}{2} = \frac{1}{4}$. Probability of $X^h = \frac{1}{2}$. Therefore,the total probability of producing an $abh$ sperm is $\frac{1}{4} 	imes \frac{1}{2} = \frac{1}{8}$.

List-$I$	List-$II$
$A$. $\text{ABO}$ blood group	$i$. Same phenotypic and genotypic ratio
$B$. Human skin colour	$ii$. Pleiotropy
$C$. Phenylketonuria	$iii$. Multiple allele
$D$. Incomplete dominance	$iv$. Polygenic inheritance

$A$ male human is heterozygous for autosomal genes $A$ and $B$ and is also hemizygous for the hemophilic gene $h$. What proportion of his sperms will be $abh$?

Similar Questions

Match the List-$I$ with List-$II$:

List-$I$ List-$II$

$A$. $\text{ABO}$ blood group $i$. Same phenotypic and genotypic ratio

$B$. Human skin colour $ii$. Pleiotropy

$C$. Phenylketonuria $iii$. Multiple allele

$D$. Incomplete dominance $iv$. Polygenic inheritance

Hybrid vigour is due to

Differences in twins suggest

$A$: Antlers in male deer are sex-influenced traits.
$R$: These are controlled by autosomal genes which are influenced by the sex of the bearer.

How do genetic disorders arise? Explain by giving suitable examples.

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