WebNational Center for Biotechnology Information WebWhich of the following findings supports the fact that the presence of the Y-chromosome rather than the lack of a second X-chromosome determines the development of maleness in mammals? a. A human with an X0 genotype (Turner syndrome) is phenotypically female. b. A human with an XXY genotype (Klinefelter syndrome) is phenotypically male. c.

3.2: X-linked inheritance - Biology LibreTexts

WebThe male of these species have two X chromosomes (XX); as a result, male is the homogametic sex since all the sperms produced by males, have one X chromosome. Fertilization of a X containing egg with a sperm gives … Websex chromosome, either of a pair of chromosomes that determine whether an individual is male or female. The sex chromosomes of human beings and other mammals are … havilah ravula

Science: How the gene for maleness doubles up in mice

WebApr 22, 1989 · Scientists have recently identified a gene, called ZFY, on the Y chromosome of humans that, they believe, determines maleness. Most placental mammals have a … WebJan 16, 2024 · Maleness in mammals is genetically determined by the Y chromosome. On the Y chromosome SRY is known as the mammalian male-determining gene. Both placental mammals (Eutheria) and marsupial mammals (Metatheria) have SRY genes. WebSep 1, 2000 · Like other mammals, human females have two X chromosomes (XX) and males have a single X and a single Y chromosome (XY). The X is large (5% of the total length of a single set of chromosomes) and bears a proportional number of genes (3000 or 4000), which have a variety of functions much like those of genes located on other … havilah seguros