Chapter 13 - Meiosis and Sexual Life Cycles

genetic code

genetic code

The ________ is written in DNA, a polymer made up of four distinct nucleotides.

homologous pair

Each ________ is made up of one chromosome from the maternal set (red) and one from the paternal set (yellow) (blue)

reproductive cells

Gametes, which are ________ in animals and plants, are the vehicles that carry genes from one generation to the next.

Drosophila melanogaster

The fruit fly ________, for example, has a diploid number (2n) of 8 and a haploid number (n) of 4, whereas dogs have 2n of 78 and n of 39.

Male

________ and female gametes (sperm and eggs) combine during fertilization, passing on genes from both parents to their offspring.

scientific study of heredity

The ________ and inherited variation is known as genetics.

haploid sets of chromosome

The resulting fertilized egg, or zygote, is diploid because it contains two ________- bearing genes representing the maternal and paternal family lines.

bdelloid rotifer

A(n) ________, an animal that reproduces only asexually.

Karyotypes

________ are created by isolating somatic cells.

microscope

Are stained when they are most condensed- during metaphase- and then seen via a(n) ________ using a digital camera.

Nonsister chromatids

________ are one maternal and one paternal chromatid in a pair of homologous chromosomes.

Bdelloid rotifers

________, it turns out, are an exception to the norm that sex alone creates genetic diversity: Other than sexual reproduction, bdelloids have ways for creating genetic diversity.