GENETICS The ability to curl your tongue up on the sides Is dominant to not bein
ID: 308894 • Letter: G
Question
GENETICS The ability to curl your tongue up on the sides Is dominant to not being able to roll your tongue. A woman who can roll her tongue marries a man who cannot roll his tongue. Their first child has his father's phenotype. What are the genotypes of the Mother ___ Father ___Child____ What's the probability a second child won't be a tongue roller? _____ Explain why below: The common grackle, Quiscalus quiscula, is a species of robin-sized blackbirds that is common in Atlantic Canada. In grackles, long tails (S) are dominant to short tails (s). A short-tailed female grackle is mated with a long-tailed male grackle that had one parent with a long tail and one parent with a short tail. What is the genotype of the male? ____ Assuming 4 hatchlings, how many of each genotype would be present in the Fi generation? SS____ Ss____ ss____ How many of each phenotype would be present in the F_1 generation? long tail____ short tail_____Explanation / Answer
3.
Since the child has recessive cahracter, that is he/she can't roll the tongue, that means the mother is heterozygous.
Let 'T' be the dominant allele and 't' be the recessive allele.
Genotype of the mother is : Tt
Genotype of the father is: tt
The probability of the second child won't be a tongue roller is : 1/3
Punett square analysis: Tt x tt
Since one child already is not a tongue roller, so the probability of second child to be a non tongue roller is: 1/3
T t t Tt (Tongue roller) tt (not a tongue roller) t Tt (Tongue roller) tt (not a tongue roller)Related Questions
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