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What is the probability that both individuals IV-1 and IV-2 will be affected?

In a species of lizard, skin color is determined by a single gene with two alleles. A lizard from a true-breeding green strain is mated with a lizard from a true-breeding brown strain. The F1 offspring are all green. Two of the F1 offspring are mated with each other. What proportion of the green F2 offspring is expected to be homozygous?

In another species, individuals with one X chromosome show increased transcriptional activity from that X chromosome compared to the transcriptional activity of each X chromosome in individuals with two X chromosomes. Which dosage compensation mechanism is occurring?

The presence of one or more extra complete sets of chromosomes is known as:

If an affected father and an unaffected mother have children such that all daughters but no sons show a rare disease, what type of inheritance pattern does this suggest?

What is the most likely genotype for individual I-1, who is represented by a colored-in square in the pedigree?

The cell of a tetraploid organism in the G1 phase of the cell cycle would be described as:

In a Pokémon-like species (“Mon”), body color depends on two genes. The product of the P gene converts a colorless precursor into a pink pigment. The product of the M gene transports pigment to the surface. Each gene has a recessive loss-of-function allele (p and m, respectively). Gene M is recessively epistatic to gene P (any mm genotype produces white coloration). What proportion of offspring will have white coloration from the following cross: Ppmm × PpMm (uppercase P lowercase p lowercase m lowercase m crossed with uppercase P lowercase p uppercase M lowercase m)

In a diploid organism with 2n = 12 chromosomes, what chromosome numbers are possible in the gametes if a single nondisjunction event occurred in meiosis II? Select all that apply.

The cell of a tetraploid organism at the end of the S phase of the cell cycle would be described as: