>> the Y chromosome produces testes-determining factor (TDF) which in turn causes the development of the testes.

asked Mar 3, 2016 in Psychology by Cessimer. Two X chromosomes are needed for the development of fully functioning ovaries.

Genes located on the X chromosome are called X-linked genes, and these genes determine X sex-linked traits. Both functions of the testicle are influenced by gonadotropic hormones produced by the anterior pituitary. During pregnancy, the presence of a Y chromosome leads the fetus to produce testes. Recent genomic analyses in Drosophila, however, show that gene gain is prominent on young Y chromosomes.Meiosis- and RNAi-related genes often coamplify on recently formed X and Y chromosomes, are testis-expressed, and produce antisense transcripts and short RNAs. 2 c. 3 d. 4. general-psychology; 0 Answer. answered Mar 3, 2016 by Bridget . Testis-determining factor (TDF), also known as sex-determining region Y (SRY) protein, is a DNA-binding protein (also known as gene-regulatory protein/transcription factor) encoded by the SRY gene that is responsible for the initiation of male sex determination in therian mammals (placental mammals and marsupials). The XY sex-determination system is the sex-determination system found in humans, most other mammals, some insects (), some snakes, some fish (), and some plants (Ginkgo tree). Y chromosomes carry the necessary genes for the development of male gonads, or testes.

There are two sex chromosomes (one pair) among them known as X and Y chromosome.

Every man has X and Y chromosome and Y chromosome decides the male sex. Gender is determined by the sex chromosomes. Luteinizing hormone (LH) results in testosterone release. • Chromosome pair 23 is radically different for males and females: females have two X chromosomes, whereas males have an X chromosome paired with a much smaller Y chromosome • The Y chromosome carries a male-determining gene, SRY, which causes testes to develop. In the mole-vole, X linkage of the testis-organizing H-Y gene is favored over its autosomal inheritance. Testis-determining factor (TDF) or sex determining gene Y (SRY) located on the Y chromosome is one such gene.

XX male syndrome, also known as De la Chapelle syndrome, is a rare congenital intersex condition where an individual with a 46 XX karyotype (otherwise associated with females) has phenotypically male characteristics that can vary among cases. How many genes found on the Y chromosome trigger the testes to produced testosterone? Y chromosomes are typically viewed as genetic wastelands with few intact genes.

In these cases, the genotype is 46, XX – this would normally indicate a female genotype. Functions of the Y chromosome These two chromosomes are designated as gender determination chromosomes. -Y chromosome has gene called ____ that codes for protein called testis-determining factor (TDF)-TDF then interacts w/ genes on some of other chromosomes, including gene on X chromosome for androgen receptors and genes that initiate development of male anatomy The gene that codes for the testis-determining factor (TDF) is found in or on the _____. The SRY gene is required, however, and it is almost always located on the Y chromosome. C. The SRY gene on the Y chromosome signals the testes to develop testosterone, which signals male tissues to develop. Key Difference – X vs Y Chromosomes The human genome has 46 chromosomes, arranged in 23 pairs.

These organs produce estrogen and testosterone, which in turn signal either female or male tissue to develop. The testes then secrete androgens that stimulate the formation of a …

In this system, the sex of an individual is determined by a pair of sex chromosomes.Females typically have two of the same kind of sex chromosome (XX), and are called the homogametic sex. SRY is largely responsible for testis formation. If the Y chromosome is present, the baby will be a boy.

Each of these chromosomes contains the genetic information that determines everything from the baby's eye and hair color to the baby's sex. Y chromosome When it is cold, the __________ contracts and draws the testes closer to the body to keep them warm. The Y chromosome is not necessary for the male phenotype.


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