Y chromosome

determined that the honey, which is the wild type, is the dominant allele and the ebony color is the recessive allele. Eye color, eye shape, and bristle morphology were all determined to be sex linked on the X chromosome as they are more prevalent in the males. If these genes were found on the Y chromosome, there would be no females found with mutations in the eye

Chapter four was on the Genes, DNA, chromosomes are what makes you who you are there the settlement structure that is giving to you by your farther and mother. these instructions are in the cells. Remember all living organism are made up of cells there are many different types like nervous cells, hair cells and skin cell. They all also have different shapes and forms. But every cells has the same basic parts the cells has an outer boarder call the membrane which we spoke about in chapter one. And

fruit fly has four pair of chromosomes, while a rice plant has 12, and a dog has 39? In addition, I did not know how chromosomes were first discovered by “Scientists looking at cells under the microscope first observed chromosomes in the late 1800s. Researchers gained a much better understanding of chromosomes in the early 1900s through Thomas Hunt Morgan’s pioneering studies. Morgan made the link between chromosomes and inherited traits by demonstrating that the X chromosome is related to gender and

where the cell grows and undergoes DNA replication is a vital part to cell division, which precedes mitosis. The onion root lab aims to view two distinct parts of the specimen’s tip, area x and y, under a light microscope to determine at which location cell division happens at a more frequent rate. If area Y, the middle right section of the onion root, is observed, then there will be a smaller concentration of cells undergoing cell division. If the area X, the bottom left section of the onion root

be seen as the powerhouse machine in determining the sex of an individual. The SRY gene commonly called the Sex Determining Region of the Y- chromosome can normally cause the testis to develop rather than an ovary when it is presented in the chromosome. The function of the SRY gene is to provide a set of instructions for making the Sex-Determining region of the Y protein, which can also perform as a transcription factor, binding to specific regions of DNA and aid in the control and regulation of particular

The condition occurs when a female has one x chromosome instead of the usual two chromosomes. Most sufferers of Turner syndrome grow to be shorter than most children on their age group and most only have life expectancy of up to 50 years while some tragically pass away as young as 13 years old.. Although plenty of information on Turner syndrome in known, researchers and scientists are still trying to figure out exactly which genes in the x chromosome are responsible. Most cases of Turner syndrome

16) D) prophase. 17) 18) During which phase of mitosis do the chromosomes line up on a plane equidistant from the two spindle poles? A) anaphase B) metaphase C) telophase D) prophase 19) At the start of mitotic anaphase, A) the chromatid DNA replicates. B) the centromeres of each chromosome come apart. C) nuclear envelopes begin to form around the chromosomes. D) equivalent and complete collections of chromosomes have reached the two poles. 18) 19) 2 20) During which phase

Genetics is the study of heredity and the different inherited characteristics (Dictinonary.com). All humans are made up of cells. Each cell contains chromosomes. Chromosomes are genetic material that determine many things about a person. For example, their height, hair color, eye color, sex, and personality traits. Deoxyribonucleic acid is in charge of the transmission of genetic materials. A single, cell develops into the large organs that is a human newborn infant in 266 days (Infant and Early

cells being identical to the parent cell. However, sexual reproduction takes 50% (about) of the chromosomes of each parent to create a new diploid (zygote) which creates genetic variation and could be advantageous to evolving/natural selection. 2. Explain what happens during crossing over and when it occurs in meiosis. Crossing over occurs in prophase I which is the first prophase of meiosis. Two chromosomes each from one parent can physically connect and share genetic information (creating a chiasma)

X-linked dominant inheritance is a mode of genetic inheritance by which a dominant gene is carried on the X chromosome. X-linked dominant traits do not necessarily affect males more than females (unlike X-linked recessive traits). The exact pattern of inheritance varies, depending on whether the father or the mother has the trait of interest. All daughters of an