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ollegr [7]
2 years ago
12

Cats normally have a total of 18 toes, 5 on each front paw and 4 on each back paw. But some cats express the dominant phenotype

for polydactyly, which results in the development of extra toes on one or more paws. Jake, a Canadian tabby cat, has 28 toes and is recognized by the Guinness Book of World Records as the cat with the most toes.Suppose that Jake mates with a female cat, Lucy, who has 18 total toes. Over several years, they have multiple litters and a total of 16 kittens (10 males and 6 females). The total number of toes on each kitten ranges from 21 to 25.If we use the letter P to represent the polydactyly gene, what is Jake's genotype?a. Ppb. ppc. PPd. You cannot determine Jake's genotype from this information
Biology
1 answer:
Anna [14]2 years ago
8 0

Answer:

c. PP

Explanation:

Jake has dominant phenotype for polydactyly so he must be PP or Pp. Lucy has normal number of toes which is caused by recessive genotype so she is definitely pp.

If Jake was Pp, Pp X pp would produce half Pp and half pp kittens which means that some kittens should be born with recessive trait 18 toes. However none of the kittens have 18 toes and all of them have 21 to 25 toes. So Jake can not be Pp.

Jake is PP because when PP X pp all the kittens will have Pp genotype resulting in dominant phenotype of polydactyly. All the kittens have more than the recessive 18 toes hence they are Pp. However they have variable number of toes because polydactyly trait has variable expressivity.

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Answer:

Explanation:

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8 0
2 years ago
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When Thomas Hunt Morgan crossed his red-eyed F1 generation flies to each other, the F2 generation included both red- and white-e
EastWind [94]

Answer:

Gene is present on the X chromosome.

Explanation:

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The linkage of sex chromosomes is present in Drosophila as well. The cross between the F1 generation leads to both the red and white eyed flies because the eye color gene is present on the X chromosome. The males contain only one X chromosome and the presence of recessive gene results in the white color whereas in females both the X chromosomes must contain recessive gene for the white color.  

Thus, the answer is gene involved is on the X chromosome.

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Answer:

The correct answer will be option-A

Explanation:

Desert biomes are characterised by the presence of the arid conditions or with few or less amount of rainfall.

The plant groups called the bryophytes and pteridophytes are dependent on the water for their fertilization which allows completing their life cycle.

In the desert conditions provided in the question, the mosses and ferns survived for many generations as these plant groups produced sperms with flagella which helped the sperms to swim in the water provided by the 10-inch rainfall per year and reach the female gamete and fertilize the egg cell.

Thus, option-A is the correct answer.

6 0
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Answer:

Size of the band varied

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Thus, the size of the band varied is correct.

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