troublepuppy764
Answered

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Sagot :

marianaegarciaperedo

Answer:

Option C is correct. 50% of the children will be able to roll their tongue

Explanation:

Available data:

  • The diallelic gene TR controls the ability to roll the tongue
  • The T allele expresses the ability to roll the tongue and is dominant
  • The t allele expresses the inability of tongue rolling and is recessive
  • Woman: Nontongue roller, tt
  • Man: Heterozygous for tongue rolling, Tt

Cross: the Man and the woman

Parentals) Tt    x    tt

Gametes) T   t      t    t

Punnett square)

                  T        t

         t       Tt       tt

         t       Tt       tt

F1) 2/4 = 1/2 = 50% of the progeny will be heterozygous tongue roller individuals, Tt

    2/4 = 1/2 = 50% of the progeny will not be tongue rollers, tt

50% of the children will be able to roll their tongue

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