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Bond [772]
2 years ago
10

This is the karyotype of a child with a genetically inherited condition called klinefelter's syndrome. review the chromosomes of

the child. predict how the child may have ended up with klinefelter's syndrome.
a.the karyotype shows an extra x chromosome that could have been inherited either parent.
b.the karyotype shows an extra x chromosome that must have been inherited from the mother.
c.the karyotype shows an extra chromosome that is the result of a genetic mutation, called substitution.
d.the condition is caused by mutagens in the child's environment resulting in a change in chromosome number.
Biology
2 answers:
Setler79 [48]2 years ago
7 0
Klinifelter syndrome is a condition symbolized by XXY, in which ine extra X chromosome come from wither parent (either from mother or from father).
iVinArrow [24]2 years ago
6 0
The karyotype shows an extra X chromosome that could have been inherited either parent.
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2 years ago
Suppose a species of bird called the red-crested warbler has a plumage length that is controlled by a single gene. The Plm allel
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We are going to have different allele frequencies for the two populations

North American:

72 birds total => 144 alleles

72 - 55 birds = 17 short plume birds.

q^2 = (2*17) / 114 = 0.236

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Freq(long plume allele) = p = 1 - q = 0.514

From this North American population we get

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0.514 * 114 = 59 short plume alleles

South American:

252 birds total => 504 alleles

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Blended population has

55 + 82 = 137 long plume alleles

59 + 422 = 481 short plume alleles

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q = 481/618 = 0.778

The new population has the p and q from the blended population. The new population has 1000 individuals. The portion of long plumed will be homozygote long plumage + heterozygote, which is p^2 + 2pq, and you multiply that by the population size 1000 to get the final answer.

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In a dihybrid cross of two heterozygous individuals, you expect a 9:3:3:1 phenotypic ratio in the offspring, but observe a ratio
almond37 [142]

Answer:

e. Epistatic interaction of the two genes

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The expected phenotypic ratiio of the offsrping of a dihybrid cross is:

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In the Duplicate Recessive Epistasis, the A_bb, aaB_ and aabb individuals all have the same phenotype, making for the ratio 9:7. What those three genotypes have in common is that in all of them at least one of the two genes  is homozygous recessive (either <em>aa</em> or <em>bb</em>).

This usually happens one the products of genes A and B are enzymes of the same metabolic pathway.

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