Some humans are able to roll their tongue, while others are not. Two parents (both tongue-rollers) have four children, Some of them are tongue rollers and some of them are not. Which of the following statements hold true regarding this? (i) The allele for tongue-rolling is dominant (ii) The probability that their next child will be a tongue-roller is 0.5. (iii) The probability that their next child will not be a tongue-roller is 0.75. (iv) Both parents have one allele for tongue-rolling and one allele for non-tongue-rolling.

Some humans are able to roll their tongue, while others are not. Two p

1.	Some humans are able to roll their tongue, while others are not. Two parents (both tongue-rollers) have four children, Some of them are tongue rollers and some of them are not. Which of the following statements hold true regarding this? (i) The allele for tongue-rolling is dominant (ii) The probability that their next child will be a tongue-roller is 0.5. (iii) The probability that their next child will not be a tongue-roller is 0.75. (iv) Both parents have one allele for tongue-rolling and one allele for non-tongue-rolling.
Answer» Some humans are able to roll their tongue, while others are not. Two parents (both tongue-rollers) have four children, Some of them are tongue rollers and some of them are not. Which of the following statements hold true regarding this? (i) The allele for tongue-rolling is dominant (ii) The probability that their next child will be a tongue-roller is 0.5. (iii) The probability that their next child will not be a tongue-roller is 0.75. (iv) Both parents have one allele for tongue-rolling and one allele for non-tongue-rolling.