Please just explain the correct answer. No need for everyone. Thank you!

Zuzu the cat is homozygous for the allele that produces black fur pigment.She is also homozygous for the allele that prevents pigment from being placed into hair follicle cells, therefore, her fur is white.Which of the following terms best

describes this observation?

genetic heterogeneity

incomplete penetrance

codominance

multiple alleles

epistasis

Full phenotypic expression of both members of a gene pair in the heterozygous condition is_________________.

dominant inheritance

incompletely penetrant inheritance

genetic heterogeneity

codominant inheritance

epistatic inheritance

Which of the following choices are bothdiploid?

Polar bodies and secondary spermatocytes

Polar bodies and spermatids

Primary oocytes and spermatogonia

Secondary oocytes and secondary spermatocytes

Secondary spermatocytes and spermatogonia

Crossing over occurs during ________ and produces ___________.

Meiosis II; haploid gametes

Meiosis I; genetic diversity

Meiosis II; diploid gametes

DNA Synthesis; haploid gametes

Mitosis; genetic diversity