A karyotype is a complete set of chromosomes that constitutes the entire genome of a species. X Y The image above shows one chromosome pair from a human's karyotype. This person A. definitely has a genetic defect. B. is a male. C. is a female. D. reproduces asexually.
Added by Christie H.
Close
Step 1
Step 1: The image shows one chromosome pair from a human's karyotype, specifically chromosome 21. Show more…
Show all steps
Your feedback will help us improve your experience
Sri K and 73 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
A karyotype is the number and visual appearance of the chromosomes in the nucleus of an organism's cell. The diagram below shows a human karyotype. (a) Was the cell that contained the chromosomes shown in this karyotype, haploid or diploid and why? (b) What sex is this individual? State why you reached this conclusion? (c) What else does this karyotype tell you about the individual?
Madhur L.
The figure that follows shows the metaphase chromosomes of a male of a particular species. These chromosomes are prepared as they would be for a karyotype, but they have not yet been ordered in pairs of decreasing size. a. How many chromosomes are shown? b. How many chromatids are shown? c. How many centromeres are shown? (Count each sister centromere separately.) d. How many pairs of homologous chromosomes are shown? e. How many chromosomes on the figure are metacentric? Acrocentric? f. What is the likely mode of sex determination in this species? What would you predict to be different about the karyotype of a female in this species?
Of all the varying types of sex chromosome abnormalities, one possibility—that of an individual having one Y but no X—has never been reported. Which of the following statements is the most likely reason that medical researchers have yet to report a person having a karyotype with one Y and no X? a) There is no meiotic event that could produce an egg that does not have an X chromosome. b) Individuals are probably born with this karyotype; however, because the phenotypic abnormalities caused are so slight, they live out their lives normally and are unaware of this genetic anomaly. c) The $Y$ chromosome needs the $X$ chromosome to be present in the cell in order for its genes to be expressed. d) The X chromosome contains genes that are unrelated to sex determination and are essential for life. e) Our current technology for karyotyping would not reveal such an abnormality.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD