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CH11

Biology 1301

QuestionAnswer
If purple flower color is dominant in pea plants, a cross between P generation purple and white plants will result in all purple flowers in the F1 generation.
If the probability of X occurring is 1 in 4, and the probability of Y occurring is 1 in 5, the probability of both occurring is (1/4)(1/5) = 1/20
A testcross is used to determine if a parent with a dominant trait is heterozygous or homozygous
A parent has a genotype of RrYy. What is the probability of having a gamete with the RY genotype 1/4
Your father is heterozygous for a recessive disorder. You know your mom has two "good" alleles. What is the probability that you will have the disorder 0%
Your father is heterozygous for the recessive disorder phenylketonuria (PKU). You know your mom has two "good" alleles. What is the probability that you will have the disorder 0% but you will have a 50% chance of passing the "bad" allele on to your children
R is the dominant allele for a round pea, r is the recessive allele for a wrinkled pea. If you cross plants having round peas with plants having wrinkled peas, you will be able to determine if the round pea plant is homozygous or heterozygous
If your mother is heterozygous for Huntington disease, which is caused by a dominant allele, the odds of your inheriting the disorder from her are 1/2
If your mother and father both have cystic fibrosis, which is caused by a recessive allele, the odds of your having cystic fibrosis are 1
Round is the dominant trait for a pea; the recessive allele produces a wrinkled pea. How can you obtain true-breeding pea plants having round peas with the least amount of work Cross plants having round peas with plants having wrinkled peas. This will tell you which round pea plants are homozygous dominant and are thus true-breeding.
A cross is done between parents with genotypes aaBbCc and aaBbcc. What is the probability that offspring will have the same genotype as the first parent? 1/4
A couple are both heterozygous for the dominant allele for polydactyly. They want to have three children. What is the probability that all three children will have polydactyly 27/64
Your mother has albinism, which is a recessive trait. You learn that your spouse's mother also has albinism. Neither you nor your spouse have albinism. What are the odds that your first child will have albinism 1/4
The key difference between incomplete dominance and codominance is with incomplete dominance it is possible to detect the expression of a recessive allele; in codominance, both alleles contribute equally to the phenotype
Two snapdragons heterozygous for alleles that encode red and white flower color are crossed. If the red and white alleles show incomplete dominance, what will be the phenotypes and ratios of the F2 generation? 25% red, 50% pink, 25% white
You have type O blood (genotype ii). Who can you donate blood to in an emergency types A, B, AB, and O
The different alleles in human blood type are a demonstration of dominance and codominance
Mouse pigmentation is subject to epistasis of the B alleles by the d alleles. B (black) is dominant over b (brown). D is dominant over d. Homozygous d is epistatic to the black and brown genes. Given this information, what genotypes give you a white mouse BBdd and Bbdd
We now know that some of the 7 alleles Mendel studied are on the same chromosome in pea plants. Despite this, the law of independent assortment still applies. How can you explain this There is recombination via the synaptonemal complex during meiosis
True or False: A test cross always uses a homozygous recessive organism as one parent True
Created by: TejasRanger29
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