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A pair of mice are bred several times, generating the following data table. What are the most likely genotypes of the parents?
FF and ff


FF and Ff


Ff and Ff


Ff and ff

A pair of mice are bred several times generating the following data table What are the most likely genotypes of the parents FF and ff FF and Ff Ff and Ff Ff and class=

Respuesta :

Because the allele for white fur is recessive, the only possible genotype for a white-fur mouse is ff.Because both parents can only pass down an fallele to the offspring, all of the offspring will have the ffgenotype aswell, resulting in 100% white-fur offspring.

Histrionicus

A pair of mice are bred several times, generating the following data table. the most likely genotypes of the parents is - Ff and ff.

A single gene coding for fur color in mice. The gene has two traits, black fur and white fur, represented by alleles F and f.  Here, a pair of mice has been bred several times to generate the same data of 22 black fur and 23 white fur mice.

  • The data shows that both traits show the phenotypic ratio of black to white mice is 1:1.
  • A phenotypic ratio of 1:1  of black fur offspring to white fur offspring, the parent mice must have genotypes Ff and ff.
  • Ff × ff will produce offspring with the following genotypes will be produced: Ff, Ff, ff and ff.
  • Ff is black-furred while ff is white-furred.

    F     f

f   Ff   ff

f   Ff   ff

 Thus, 22 black mice and 23 white mice which represents a 1:1 ratio will only be produced by parents mice with genotypes: Ff and ff.

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