AP Biology › Understanding Dominant and Recessive Traits
Which is true of a pea plant with rounded pods and alleles Rr?
In a cross between two organisms, the offspring are referred to as the ___ generation.
Brown fur (B) in mice is dominant over white fur (bb). You have two brown mice, and when they are bred together you obtain 3 brown-haired offspring and one white-haired offspring. What must have been the genotypes of these brown-haired parents?
A certain kidney disease is controlled by an allele that is autosomal recessive. A man's father has the condition, while his mother is healthy and homozygous for the normal allele. If the man marries a woman who is a carrier, what is the probability that their first child will have the disease?
Two mice are crossed. The father is black and heterozygous, and the mother is white and homozygous. If they have twelve offspring, how many will most likely be white if the allele for color is autosomal?
What is an allele?
If A is a dominant allele conferring brown hair and a is the recessive allele conferring blonde hair, a heterozygote as what genotype?
Dominant traits are __________.
If B is a dominant allele conferring a purple flower and b is the recessive allele conferring a white flower, a homozygote recessive plant will have what phenotype?
What does the principle of dominance in genetics state?