| 单词 | spermatocyte |
| 例句 | The diploid primary spermatocyte goes through meiosis I to produce two haploid cells called secondary spermatocytes. Concepts of Biology 2013-04-25T00:00:00Z Meiosis starts with a cell called a primary spermatocyte. Biology for AP Courses 2022-06-09T00:00:00Z Meiosis has two rounds of cell division: primary spermatocyte to secondary spermatocyte, and then secondary spermatocyte to spermatid. Anatomy and Physiology 2013-06-19T00:00:00Z In each primary spermatocyte the pairing of the chromosomes already alluded to occurs as indicated in Fig. 9b, p. Being Well-Born An Introduction to Eugenics 2012-05-22T15:16:53.140Z The odd chromosome of the Elaters stains less deeply than the others in the first spermatocyte. Studies in Spermatogenesis Part II Each secondary spermatocyte divides after meiosis II to produce two cells called spermatids. Concepts of Biology 2013-04-25T00:00:00Z At the end of the first meiotic division, a haploid cell is produced called a secondary spermatocyte. Biology for AP Courses 2022-06-09T00:00:00Z One of these cells remains a spermatogonium, and the other becomes a primary spermatocyte, the next stage in the process of spermatogenesis. Anatomy and Physiology 2013-06-19T00:00:00Z In each primary oöcyte as in the primary spermatocyte the chromosomes pair and two rapidly succeeding divisions follow in one of which the typical numerical reduction in the chromosomes occurs. Being Well-Born An Introduction to Eugenics 2012-05-22T15:16:53.140Z First spermatocyte, condensation of chromatin granules to form tetrads in the linin spireme. Studies in Spermatogenesis Part II The formation of the spermatozoa is peculiar in that the original spermatocyte cell-body, as a rule, does not divide; but the four nuclei resulting from the two maturation divisions develop into sperm-heads in one cell. Studies in Spermatogenesis Part I Four sperm result from each primary spermatocyte that goes through meiosis. Biology for AP Courses 2022-06-09T00:00:00Z As in mitosis, DNA is replicated in a primary spermatocyte, before it undergoes a cell division called meiosis I. During meiosis I each of the 23 pairs of chromosomes separates. Anatomy and Physiology 2013-06-19T00:00:00Z The primary spermatocyte arises by growth of one of the last generation of spermatogonia. Explanation of Terms Used in Entomology Daughter plates of the first spermatocyte are shown in figure 121, and equatorial plates of the second spermatocyte in figure 123. Studies in Spermatogenesis Part II Figure 98 is a very early stage of the spermatocyte of the first order, showing the element x as a U-shaped body. Studies in Spermatogenesis Part I First spermatocyte, anaphase, showing elongated centrosome and diverging univalent chromosomes. Studies in Spermatogenesis Part II First spermatocyte, growth stage, x the odd chromosome. Studies in Spermatogenesis Part II First spermatocyte, daughter plates containing 11 and 12 chromosomes, respectively. Studies in Spermatogenesis Part II First spermatocyte, equatorial plate, x the unequal bivalent. Studies in Spermatogenesis Part II Young spermatocyte, element x attached to one end of a long, fine spireme. Studies in Spermatogenesis Part I The germ glands were rather far advanced, but some good spermatogonial and spermatocyte cysts were found. Studies in Spermatogenesis Part II Second spermatocyte, equatorial plates containing 9 large chromosomes and 1 small one. Studies in Spermatogenesis Part II First spermatocyte, daughter plates containing 18 and 19 chromosomes, respectively. Studies in Spermatogenesis Part II First spermatocyte, equatorial plate, x the odd chromosome. Studies in Spermatogenesis Part II Condensation stage, bouquet stage, spireme stage, and rather rare tetrad stage of young spermatocyte. Studies in Spermatogenesis Part I Figure 191 is an equatorial plate from a second spermatocyte, showing the small chromosome. Studies in Spermatogenesis Part II Second spermatocyte, equatorial plates of the two classes. Studies in Spermatogenesis Part II Second spermatocyte, daughter plates of the two classes. Studies in Spermatogenesis Part II First spermatocyte, equatorial plates of two species, 10 and 11 chromosomes. Studies in Spermatogenesis Part II |
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