The disease caused by B19 virus, a (papillomavirus/parvovirus/polyomavirus), is known as fifth disease and produces a distinctive rash.
Fill in the blank(s) with the appropriate word(s).
parvovirus
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The first cell of a new individual that is the
result of sexual reproduction is a
a. zygote. b. embryo. c. gamete. d. germ cell. e. sporophyte
In sexual reproducers, meiosis gives rise to
a. diploid gametes. b. haploid gametes. c. triploid gametes. d. haploid germ cells. e. diploid germ cells.
Following cleavage of the zygote, which of the following is the first to occur?
a. blastula b. gastrula c. neural crest d. morula e. primitive streak
What is required for the separation of homologous chromosomes at anaphase I?
a) the separation of sister centromeres b) the dissolution of the chiasmata c) the separation of the nucleosomes d) the dissolution of the centromeres e) the dissolution of the centrosomes