Which of the following is an example of codominance?
Which of the following is an example of complete dominance (traditional dominance of only 1 dominant trait and 1 recessive trait)?
A type of golden brown color in horses is called palomino. Several pairs of palomino horses are mated. The results of the crosses are shown in the table below.
Which of the following is the most likely inheritance pattern of coat color in horses?
In horses, the allele for a bay coat (brown with black mane, tail and legs) and the allele for a cream coat can combine to make a buckskin coat.
The allele B is used for bay; C is used for cream.
Buckskin horses have one bay allele and one cream allele (BC).
The genotype BC makes a buckskin coat, as neither allele is dominant.
Cross a bay stallion with a cream mare. What are the offspring phenotype percentages?
Mrs. Jay has decided she wants to go into the dog breeding business and wants to use her dog Millie. Millie is heterozygous light brown (BW), a combination of dark brown (BB) and white (WW). Mrs. Jay wants to get puppies that are dark brown, light brown and white and has two choices of dogs she can mate with Millie: Denver, who is also light brown or Charley, who is white.
Help Mrs. Jay figure out who she should mate with Millie to get three different colors of puppies.
In a botanical garden, two sections are dedicated to different types of plant reproduction.
In one section, the gardener notices that the **potato plants** are thriving and producing new tubers underground, resulting in many identical plants. In another section, the gardener observes **sunflower plants** that are blooming and producing seeds, which will grow into genetically unique plants.
Based on this scenario, which statement accurately describes the reproduction processes occurring in these two sections?
A male and female child have three copies of chromosome 21. Although both parents are unaffected, their doctor explains that the disorder associated with having an extra chromosome 21, known as Down syndrome, results from a chromosomal mutation during the formation of reproductive cells. Which argument best supports this claim?
In Mendel's experiments with pea plants, he crossed a homozygous round yellow seed plant (genotype RRYY) with a homozygous wrinkled green seed plant (genotype rryy). What genetic principle explains the variation in the offspring's traits?
