answer questions d, e, f, and g. Transcribed Image Text: 3. The single locus cross with an x-linked trait. Hemophilia b is an X-linked recessive

Academic Writing Biology answer questions d, e, f, and g. Transcribed Image Text: 3. The single locus cross with an x-linked trait. Hemophilia b is an X-linked recessive

Biology

answer questions d, e, f, and g. Transcribed Image Text: 3. The single locus cross with an x-linked trait. Hemophilia b is an X-linked recessive

answer questions d, e, f, and g. Transcribed Image Text: 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.
ะก.
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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