A. What is the difference between homomorphic and heteromorphic chromosomes?
B. What is the difference between homogametic and heterogametic sexes?
C. Relate these terms to human sex determination.
A)-Homomorphic chromosome pair which are not morphologically identical( e.g., sex chromosome)
Heteromorphic chromosome pair with some homology but differing in size, shape, or staining properties.
B)-Homogametic sex refers to the sex of a species in which the sex chromosome are same. For exampke in humans, female with two X chromosome.
Heterogametic sex refers to the sex of a species in which the sex chromosome are not the same. For example in humans, male, with an X and a Y sex chromosome.
A. What is the difference between homomorphic and heteromorphic chromosomes? B. What is the difference between...
What is an important difference between chromosomal sex determination in birds and mammals? A. Female birds have two different sex chromosomes while female mammals have two different sex chromosomess. B. The heterogametic sex in birds is male while the heterogametic sex in mammales is female. C. The homogametic sex in birds is female while the homogametic sex in mammals is male. D. The heterogametic sex in birds is female, while the heterogametic sex in mammals is male.
In boa constrictors, sex is determined by the chromosomes Z and W. Males are ZZ and females are ZW. In boa constrictors, males are considered the _____ sex. a.) homozygous recessive b.) heterozygous c.) heterogametic d.) homogametic
1.a) How do we know that in humans the X chromosomes play no role in sex determination, while the Y chromosome causes maleness and its absence causes femaleness? c) How do we know that X chromosomal inactivation of either the paternal or maternal homolog is a random event during early development in mammalian females? d) How do we know that Drosophila utilizes a different sex-determination mechanism than mammals, even though it has the same sex-chromosome compositions in males and females?...
Check Your Understanding 3.1 1 What are chromosomes made of? number 2 How many chromosomes are in a human somatic cell? 46 chromosomes 3 The term used to refer to this full complement of chromosomes is the 4 How many chromosomes are in human gametes? 5 This is referred to as the number 6 Wa chicken's skin cell has 78 chromosomes, how many chromosomes would the chicken's sperm cell have? 7 How can we distinguish the 23 types of chromosomes...
Q1. Klinefelter syndrome (47, XXY) and Turner syndrome (45, X) are due to __________. A. improper segregation of autosomes during mitosis B. improper segregation of sex chromosomes during mitosis C. improper segregation of autosomes during meiosis D. improper segregation of sex chromosomes during meiosis Q2. Sex determination and sexual differentiation is controlled by A. the homogametic sex B. sex chromosomes C. homologous chromosomes D. genetic information on autosomes
microbial genetics* what is the difference between plasmaids and chromosomes? who has chromosomes? who has plasmids.? who has organellular DNA.?
1. Among the following organisms, which organisms have sex chromosomes (XY)? A. lizard and alligator B. tortoise and turtle C. anemone fish D. flies and humans E. all of the above 2. Among the following genes, which gene detects the ratio of autosomes to X chromosomes in flies? A. Sry B. Sxl C. Tra D. Dsx-M E. Dsx-F (Q3-6) The following are the various karyotypes we can observe among the organisms with the XY sex determination system. a. XYb. XXc....
Number of Chromosomes in Human Cell at Difference Stages of Melosis Identify the number of chromosomes in a typical human GERM cell during each stage of meiosis. For each stage, choose either 23 or 46 chromosomes. - Prophase - Metaphase 1 Anaphase - Telophase A 23 - Prophase II B. 46 - Metaphase II - Anaphase 11 - Telophase 11
13. What is the difference between chromatin and chromosomes? A. You would see chromatin in actively dividing cells and not in quiescence cells B. You would see chromosomes in actively dividing cells and not in quiescence cells C. You would see chromosomes in dying cells and little in living cells D. You would see chromatin in dead cells and not in living cells 22. Why are plant cells domed shaped? (A The shape facilitates cellular respiration B. Domed shape allows...
nondisjunction of the sex chromosomes during meiosis 2 in human males during gametogenesis can result in all of the following complements in a gametes EXCEPT a. no sex chromosomes b. XX c. XY d. YY e. X