Based on the karyotype, which of the following would be a reasonable statement about the production of gametes in mice?

Based on the nature of meiosis and information about the mouse genome, which of the following is an accurate model and description of anaphase II?

Which individuals demonstrate that sickle cell is recessive?

Which individuals should be half-shaded as carriers?

What is a danger to a population that reproduces asexually?

Achondroplasia is the most common form of dwarfism in miniature horses. Achondroplasia dwarfs have normal sized bodies and heads, but noticeably smaller upper legs and ears. This form of dwarfism is an autosomal dominant trait. The pedigree shows the offspring of one horse without dwarfism, Individual 1, and one with dwarfism, Individual 2. The horses with achondroplasia are shaded black.

Which of the following is the correct pairing of phenotype and genotype of Individual 1 in the pedigree?

Achondroplasia is the most common form of dwarfism in miniature horses. Achondroplasia dwarfs have normal sized bodies and heads, but noticeably smaller upper legs and ears. This form of dwarfism is an autosomal dominant trait. The pedigree shows the offspring of one horse without dwarfism, Individual 1, and one with dwarfism, Individual 2. The horses with achondroplasia are shaded black.

Based on the pedigree, which of the following is an accurate claim with evidence about the genotype of Individual 2?

Achondroplasia is the most common form of dwarfism in miniature horses. Achondroplasia dwarfs have normal sized bodies and heads, but noticeably smaller upper legs and ears. This form of dwarfism is an autosomal dominant trait. The pedigree shows the offspring of one horse without dwarfism, Individual 1, and one with dwarfism, Individual 2. The horses with achondroplasia are shaded black.

If Individual 5 mated with a homozygous dominant horse, which of the following would be a valid prediction about the offspring?

Blood type in humans has three alelles: A, B, and O. A and B are both dominant to O. Therefore, there are two ways to have Type A blood:

Blood type in humans has three alelles: A, B, and O. A and B are both dominant to o. If a couple who are both Type O marry and have three children, what are their bloodtypes?

Which blood-type is co-dominant, where both alleles are expressed in the phenotype

Trisomy is a condition in which there are 3 homologous chromosomes instead of 2 at any chromosome. Which of the following karyotypes shows a trisomy in a female?

Which of the offspring in the F2 (second) generation are clones (identical copies) of a parent in F1?

The marbled crayfish is the only decapod crustacean that reproduces asexually, with the all-female species making clones of itself from eggs unfertilized by sperm. It has been thought to have arisen when two slough crayfish (P. fallax), imported from Florida for the aquarium trade in Germany, mated.

As suggested by some preliminary evidence, the marbled crayfish has three sets of ninety-two chromosomes, not the usual two, and each set is essentially a version of the chromosomes belonging to the slough crayfish. Two of the three sets of chromosomes are virtually identical, but the third is different enough that Lyko’s team concludes the marbled crayfish likely arose from the mating of two slough crayfish from different regions of the world thrown together in an aquarium. One must have had an abnormal egg or sperm that retained two copies of its chromosomes instead of the usual single set that is in such germ cells.

How does this compare to humans?