THE normal diploid number of chromosomes in the domestic dog is 78, comprising 38 pairs of acrocentiic or telocentric autosomes and one pair of sex chromosomes In the bitch, the sex chromosomes are two large submeta centric X chromosomes, and in the male, a large submetacentric X and a ...
你可以是 XX 和男性。And biologically speaking, the root cause of sex is a pair of chromosomes: XX for females and XY for males.从生物学上讲，性别的根本原因是一对染色体：女性为 XX，男性为 XY。
To evaluate whether XX vs. XY sex chromosome complements differentially regulate sexually dimorphic humoral immune responses to HKSP immunization, the FCG mouse model was utilized (Additional file1: Fig. S1; [35,36,63]). Ovary-bearing females with XX (XXF) or XY (XYF) sex chromosomes and tes...
Well, here’s the twist. Unlike these systems, which receive autosomes from both parents, male honey bees andantsreceive chromosomes only from the female parent (the Queen). This means that they develop from unfertilized (haploid) eggs and don’t have a father, whereas fertilized (diploid)...
Men and women differ in circulating lipids and coronary artery disease (CAD). While sex hormones such as estrogens decrease CAD risk, hormone replacement therapy increases risk. Biological sex is determined by sex hormones and chromosomes, but effects of
Cytogenetic studies carried out in the two populations showed that the Mogi-Guaçu population is characterized by 2n = 38 chromosomes and undifferentiated sex chromosomes and the Tietê population presents 2n = 38 both for males and females and an XX:XY sex chromosome system. The X-chromosome ...
The large bivalent is the end-to-end association of heteromorphic sex chromosomes having very low structural homology. As many as 39% of studied spermatocytes of P. curiosa were found to be tetraploid cells. The sex chromosome system described herein is the first case of XY male heterogamety ...
Sex-specific genetic markers identified using restriction site-associated DNA sequencing, or RADseq, permits the recognition of a species' sex chromosome system in cases where standard cytogenetic methods fail. Thus, species with male-specific RAD markers have an XX/XY sex chromosome system (male he...
Turtles demonstrate variability in sex determination and, hence, constitute an excellent model for the evolution of sex chromosomes. Notably, the sex determination of the freshwater turtles from the family Chelidae, a species-rich group with wide geograp
Evolution of the avian sex chromosomes from an ancestral pair of autosomes Among the mechanisms whereby sex is determined in animals, chromosomal sex determination is found in a wide variety of distant taxa. The widespread but not... Fridolfsson, A.-K.,H Cheng,NG Copeland,... - 《Proc Nat...