Question

i need this quick

for tongue rolling (Th)is dominant over the allee for not being able to roll your an who can roll his tongue marries a woman who cannot. They had 11 2. The allele tongue a (t). A m gue children, 6 of whom could roll their tongues, and 5 of whom could not. a. What are the phenotvpes of the parents? Father: Mother What are the POSSIBLE genotypes of the parents (hint, the father could have one of two genotypes, given that he can roll his tongue).... Father: either or Mother c. What are the possible genotvpes of the father's sperm? and T_and_T OR d. What are the possible genotypes of the mother's eggs and Construct a Punnett square to determine the proportion of genotypes and phenotypes in their offipring for EACH possibility of father's genotype. Write the phenotypic ratios of the offspring for each possibility next to the Punnett Square Phenotypic ratio of offspring T+ OR Phenotypic ratio of offspring:_ e. The offspring, with 6 tongue rollers to 5 non-tongue rollers, have close to a 1:1 phenotypic ratio. Which of the above Punnett squares (and thus, father's genotypes) most closely matches a 1:1 phenotypic ratio? is genotype of the father, in this case ーーーーーーーー f. So, what the ーーーーーーーーーー

Answer 1

Q2) The allele for tongue rolling (T) is dominant over the allele for not being able to roll your tongue (t). A man who can roll his tongue marries a woman who cannot roll tongue, they had 11 children , 6 of whom could roll the tongue and 5 who cannot roll the tongue.

1. What are the phenotype of the parents?

Father _______ and Mother _________?

Answer- Father will be Tt and Mother will be tt

Explanation-

In this case the father can roll the tongue and mother cannot roll the tongue, as the tongue rolling allele is a dominant character, the presence of a single allele can show the character in a person. But not able to roll the tongue character is a recessive one to express itself, it requires the presence of two recessive alleles that is “t” and “t” so mother will be “tt” homozygous for the recessive allele and father will be heterozygous dominant because the couple produces both types of children -that is children who are able to roll their tongue and children not able to roll the tongue.

a) What are the possible genotype of the parents (hint- the father could have one of two genotype, given that he can roll his tongue)

Father is either ___ or __ and mother is ______

Answer- Father is either “TT “ or “Tt” And mother is “tt”

Explanation- Father can be homozygous dominant that is (TT) for the tongue rolling character or heterozygous that is (Tt) but mother is supposed to be homozygous recessive to express the character that is (tt) as the not able to roll the tongue character is recessive.

b)What are the possible genotype of father’s sperm ? ______ & ______ or ____ & __

Answer- Father’s sperm will be Either T & T or T & t

Explanation- Father has the dominant character so presence of a single gene can express the character. He can be either homozygous dominant or heterozygous dominant.

d)What are the possible genotypes of Mother’s egg _________ & _____.

Answer- Genotype of mother egg will be t & t.

Explanation- Here mother has recessive character so recessive character to express itself requires presence of two alleles so mother will be homozygous recessive having genotype “tt”.

Construct a Punnette square to determine the proportion of genotypes and phenotypes in their offspring for each possibility of the father’s genotype. Write the phenotype ratios of the offspring for each possibility next to Punnette square.

	T	T
t	Tt	Tt
t	Tt	Tt

Phenotypic ratio of offspring- 100% are able to roll tongue.

When the father is homozygous dominant and mother is homozygous recessive, all the offspring will be able to roll their tongue as all the offspring contains a single dominant allele. So 100% offspring will be able to roll the tongue, presence of non-rolling offspring is 0%.

OR

	T	t
t	Tt	tt
t	Tt	tt

Here Phenotypic ratio of offspring is – 1:1

Explanation- when the father is heterozygous dominant and mother is homozygous recessive they are able to produce both types of offspring in the ratio 1:1 , 50% offspring will be able to roll their tongue and 50% offspring will be not be able to roll their tongue.

e)Offspring, with 6 tongue rollers, have close to a 1:1 phenotype ratio. Which of the above Punnette square (and thus father’s genotype) most closely matches a 1:1 phenotype ratio?

Answer- The second Punnette square in which father’s genotype is “Tt” and mother’s genotype is “tt” closely matches a 1:1 phenotype ratio.

f) So, what is the genotype of the father in this case_______?

Answer- Genotype of the father in this case is “Tt”

Explanation- As the offspring include both rolling and non-rolling character individuals, father is supposed to be heterozygous dominant.