3. The single locus cross with an x-linked trait.Hemophilia b is an X-linked recessive gene that was present in the British royal family. QueenVictoria and Prince Albert had four children: 1 son had hemophilia, 1 son did not, and the twodaughters did not have hemophilia.a. List the possible genotypes of the sons and daughters. Use the following terminology:XH no hemophilia, Xh hemophilia.Two daughtersot VevophiiaSan henophitia iYSon wfotutothe mophiliab. Neither Queen Victoria nor Prince Albert had hemophilia. Use their phenotypes alongorwith the phenotypes of their children (above) to determine the genotypes of QueenVictoria and Prince Albert.Prince AlbertQuean VictoriaDraw the Punnett Square of this cross.С.homothXitXAXE X4 XAYXa XaKERY KYWhat are the expected genotype ratios of their children?td.e. If Queen Victoria and Prince Albert had a lot of children, what would be the expectedphenotype ratio of these children (phenotype here includes whether child is boy or girland whether they have hemophilia or not)?Girlhemophilia: ey wout hephilawar hemophilia: Boy w2;Take a different family. If they have a girl with hemophilia, what are the possiblegenotypes of both the girl and her parents?f.XyX XYParentsGirlg. Now consider a boy with hemophilia. What are the possible genotypes of the boy and hisparents?XaYXa Xa KaYBayY

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Asked Nov 26, 2019
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please answer questions a, b, c. 

3. The single locus cross with an x-linked trait.
Hemophilia b is an X-linked recessive gene that was present in the British royal family. Queen
Victoria and Prince Albert had four children: 1 son had hemophilia, 1 son did not, and the two
daughters did not have hemophilia.
a. List the possible genotypes of the sons and daughters. Use the following terminology:
XH no hemophilia, Xh hemophilia.
Two daughters
ot Vevophiia
San henophitia iY
Son wfotut
ot
he mophilia
b. Neither Queen Victoria nor Prince Albert had hemophilia. Use their phenotypes along
or
with the phenotypes of their children (above) to determine the genotypes of Queen
Victoria and Prince Albert.
Prince Albert
Quean Victoria
Draw the Punnett Square of this cross.
С.
homo
th
Xit
XAXE X4 XA
Y
Xa Xa
KERY KY
What are the expected genotype ratios of their children?
t
d.
e. If Queen Victoria and Prince Albert had a lot of children, what would be the expected
phenotype ratio of these children (phenotype here includes whether child is boy or girl
and whether they have hemophilia or not)?
Girl
hemophilia: ey wout hephila
war hemophilia: Boy w
2;
Take a different family. If they have a girl with hemophilia, what are the possible
genotypes of both the girl and her parents?
f.
XyX XY
Parents
Girl
g. Now consider a boy with hemophilia. What are the possible genotypes of the boy and his
parents?
XaY
Xa Xa KaY
Bay
Y
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3. The single locus cross with an x-linked trait. Hemophilia b is an X-linked recessive gene that was present in the British royal family. Queen Victoria and Prince Albert had four children: 1 son had hemophilia, 1 son did not, and the two daughters did not have hemophilia. a. List the possible genotypes of the sons and daughters. Use the following terminology: XH no hemophilia, Xh hemophilia. Two daughters ot Vevophiia San henophitia iY Son wfotut ot he mophilia b. Neither Queen Victoria nor Prince Albert had hemophilia. Use their phenotypes along or with the phenotypes of their children (above) to determine the genotypes of Queen Victoria and Prince Albert. Prince Albert Quean Victoria Draw the Punnett Square of this cross. С. homo th Xit XAXE X4 XA Y Xa Xa KERY KY What are the expected genotype ratios of their children? t d. e. If Queen Victoria and Prince Albert had a lot of children, what would be the expected phenotype ratio of these children (phenotype here includes whether child is boy or girl and whether they have hemophilia or not)? Girl hemophilia: ey wout hephila war hemophilia: Boy w 2; Take a different family. If they have a girl with hemophilia, what are the possible genotypes of both the girl and her parents? f. XyX XY Parents Girl g. Now consider a boy with hemophilia. What are the possible genotypes of the boy and his parents? XaY Xa Xa KaY Bay Y

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Step 1

The branch of biology that deals with the study of genes, heredity and genetic variations are termed as genetics. Every gene contains two alleles for a trait, a dominant allele, and a recessive allele. A dominant allele will be expressed in a person even if only it's one copy is present in the gene, while a recessive allele will be expressed in a person if its two copies are present in the gene for the given trait.

Step 2

Hemophilia b is an X-linked recessive disorder. Hence, it is a sex-linked disease.

Allele for a hemophilic X gene = Xh

Allele for a non-hemophilic X gene = XH

If a girl is suffering from hemophilia, then her genotype must be XhXh.

If a girl is not suffering from hemophilia, then her genotype must be XHXH.

If a boy is suffering from hemophilia, then his genotype must be XhY.

If a girl is carrier of hemophilia b and not suffering from the same, then her genotype must be XHXh.

Given:

Hemophilia B disease was present in British royal family. Queen Victoria and Prince Albert had four children, 1 hemophilic son, 1 non-hemophilic son, and 2 non-hemophilic daughters.

a) Possible genotype of daughters and sons is as given below:

Possible genotype of hemophilic son = XhY

Possible genotype of non-hemophilic son = XHY

Possible genotype of 2 non-hemophilic daughters = XHXh or XHXH

Step 3

b) Neither Queen Victoria nor Prince Albert has hemophilia. As one of their sons had hemophilia, but parents were not suffering from the same, then this means that Quee...

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