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WorksheetsLesson 12 - Sexual Reproduction
Total questions: 25
Worksheet time: 13mins
What term refers to different variants of a gene, based on minor differences in the DNA sequence within the gene?
allele
mutation
homolog
diploid
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?
haploid
homologous
autosomes
sex chromosomes
Reduction of chromosome number in diploid organisms is required to produce _____.
two copies of each gene
offspring with one complete genome
offspring with haploid chromosomes
duplicated pairs of homologous chromosomes
Vegetative propagation is a form of _____.
sexual reproduction
asexual reproduction
meiosis
crossing over
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 exhibits a high level of genetic diversity.
The population is primarily composed of clones.
The population reproduces by meiotic division.
The population reproduces sexually.
In what process are sister chromatids formed?
meiosis
mitosis
replication
anaphase
During meiosis, crossing over occurs during _____.
prophase I
prophase II
metaphase I
metaphase II
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?
fertilization
mitosis
replication
reduction division
During mitosis, sister chromatids separate to deliver a single copy of each chromosome to the daughter cells. A similar event occurs during which phase of meiosis?
prophase I
metaphase I
anaphase II
prophase II
One difference between mitosis and meiosis is that cells entering meiosis_____.
duplicate DNA once and divide once
duplicate DNA once and divide twice
duplicate DNA twice and divide once
duplicate DNA twice and divide twice
The close association of homologous DNA strands during prophase I is called _____.
gametogenesis
differentiation
synapsis
random chromosome alignment
After meiosis I, which of the following could be together in the same cell?
two sister chromatids connected at the centromere
an X and a Y chromosome
homologous pairs
the diploid number of chromosomes
Which of the following is true about the chromosomes in the two cells formed at the end of meiosis II?
Each cell consists of sister chromatids.
Because sister chromatids separated, the two cells are identical.
The cell is haploid, but the chromosomes remain duplicated.
Each cell contains only one copy of each type of autosome.
What is a gametophyte?
a multicellular, haploid structure
a multicellular, diploid structure
the reproductive cell of a plant
the spore-forming cell of a plant
Which of these plant structures is produced by meiosis?
gametophytes
gametes
spores
seeds
Mature sporophytes are produced by mitotic division of _____.
gametophytes
gametes
spores
zygotes
Unlike oogonia during female gametogenesis, spermatogonia _____.
divide by mitosis
divide by meiosis
replenish their own numbers during cell division
all divide prior to birth
By what process do spermatids develop into spermatozoa?
mitotic division
meiosis I division
meiosis II division
differentiation
In animals, the male gonad is called a _____.
testis
penis
prostate
ovary
In the male reproductive structure, semen supports sperm movement through _____.
the prostate gland
the epididymis
the urethra
the scrotum
Which of the following is true in egg development?
four haploid eggs are formed from each diploid primary oocyte
egg cells are much larger than sperm cells
each egg cell is genetically identical to other egg cells from the same female
each egg cell completes maturation prior to puberty
In what stage of oogenesis is a polar body first formed?
meiosis I
meiosis II
fertilization
gametogenesis
Which of the following can be contributed by a male gamete during human reproduction?
an X chromosome
mitochondria
cytoplasm
endoplasmic reticulum
Which of these is an adaptation required by female animals to reproduce through internal fertilization?
sperm
eggs
copulatory organs
gametogenesis
Unlike spermatogenesis, meiosis during oogenesis produces _____.
one ovum per primary oocyte
two ova per primary oocyte
one primary oocyte per oogonium
one ovum per oogonium
