Lesson 12 BIO

In animals, the male gonad is called a \____.

Testis

Which of the following would you expect to find when investigating a patch of cyanobacteria cells living in together in a region of the ocean?

The population is primarily composed of clones.

A cell in a section of tissue contains 30 chromosomes. Next to this cell are two smaller cells, each with 15 chromosomes. What process formed the two smaller cells?

Reduction division

One difference between mitosis and meiosis is that cells entering meiosis \____.

Duplicate DNA once and divide twice

In a diploid cell containing 16 chromosomes, if only 14 can easily be matched into pairs, what term best refers to the remaining 2 chromosomes?

Sex chromosomes

Which of the following is true about the chromosomes in the two cells formed at the end of meiosis II?

Each cell contains only one copy of each type of autosome.

Vegetative propagation is a form of \____.

Asexual reproduction

Unlike spermatogenesis meiosis during oogenesis produces \____.

One ovum per primary oocyte

After meiosis I, which of the following could be together in the same cell?

Two sister chromatids connected at the centromere

Unlike oogonia during female gametogenesis, spermatogonia \____.

Replenish their own numbers during cell division

Which of the following is true in egg development?

Egg cells are much larger than sperm cells

In what stage of oogenesis is a polar body first formed?

Meiosis I

Which of these is an adaptation required by female animals to reproduce through internal fertilization?

Copulatory organs

In what process are sister chromatids formed?

Replication

During meiosis, crossing over occurs during \____.

Prophase I

What is a gametophyte?

A multicellular, haploid structure

By what process do spermatids develop into spermatozoa?

Differentiation

In the male reproductive structure, semen supports sperm movement through \____.

The urethra

Reduction of chromosome number in diploid organisms is required to produce \____.

Offspring with one complete genome

Which of the following can be contributed by a male gamete during human reproduction?

An X chromosome

Mature sporophytes are produced by mitotic division of \____.

Zygotes

What term refers to different variations of a gene, bases on minor differences in the DNA sequence within the gene?

Allele

The close association of homologous DNA strands during prophase I is called \____.

Synapsis

During mitosis, sister chromatids separate to deliver a single copy of each chromosome to the daughter cells. A similar event occurs during which phase o meiosis?

Anaphase II

Which of these plant structures is produced by meiosis?

Spores