Biology

all choices are correct The gonads scrotum The male homologue to the labia major is the gonadotropin releasing hormone Puberty is initiated when a region of the brain begins secreting anterior pituitary gland The primary target cells for GnRH are located int eh urogenital triangle and a posterior anal triangle The perineum consists of an …

Chromosomes are categorized as either sex chromosomes or autosomes. A homologous chromosome pair consists of one autosome chromosome from each parent. Differentiate between a chromosome and a homologous chromosome pair. Mitosis results in new cells with genetic material that is identical to that of the original cell. Meiosis reduces the chromosome number by half in …

The generation to generation sequence of stages of the reproductive history of an organism; from conception to production of its own offspring. Life Cycle Any cell other than a gamete- has 46 chromosomes Somatic Cell A display of condensed chromosomes arranged in pairs. Used to screen for abnormal numbers of chromosomes or defective chromosomes associated …

A type of cell division that produces gametes. Define Meiosis sex cells Define gametes two sets of chromosomes Define diploid Cell containing a single copy of each chromosome Define haploid The production of offspring that does not involve the union of gametes Define Asexual reproduction sexual reproduction involves the production of an egg cell by …

d A portion of a DNA molecules wound around a “bead” of histone protein is called a a. spindle. b. centromere. c. cell cycle. d. nucleosome. e. furrow. e The number of chromosomes found in a eukaryotic cell a. is constant during the life cycle. b. is dependent on the age of the tissue. c. …

sequence of DNA that codes for a protein and thus determines a trait genes haploid sex cells gametes reproduction that does not involve the union of gametes and in which a single parent produces offspring that are genetically identical to the parent asexual reproduction Any cell in a multicellular organism except a sperm or egg …

A discrete unit of hereditary information consisting of a specific nucleotide sequence in DNA (or RNA, in some viruses) gene A specific place along the length of a chromosome where a given gene is located locus A haploid reproductive cell, such as an egg or sperm. Gametes unite during sexual reproduction to produce a diploid …

The entire sequence of stages in the life of an organism, from the adults of one generation to the adults of the next define life cycle The creation of offspring by a single parent, without the participation of sperm and egg define asexual reproduction The creation of offspring by the fusion of two haploid sex …

pairs of chromosomes that correspond in body cells homologous chromosomes two sets diploid number of chromosomes the process that separates homologous pairs of chromosomes in a diploid cell, forming a haploid gamete meiosis cells contain only one set of chromosomes, example gametes haploid cells the result of replicated chromosome pairs with its corresponding homologous chromosome …

-Involves only mitosis -Based on the mitotic division of the nucleus -An organisms that reproduces asexually may be single-celled like yeast, reproducing itself with each cell cycle, or it may be multicellular like the cholla cactus, that breaks off a piece to produce a new multicellular organism -Rapid and effective way of making new individuals …

super coiled DNA and proteins. the DNA is wrapped around the protein. what are chromosomes made of? pair of chromosomes that are identical in size, shape, and genetic information what are homologous chromosomes? a cell that contains 2 sets of chromosomes What is a diploid number? 2N=46 What is the human diploid number? a cell …

4 Red blood cells have 6 different genotypes. These genotypes result in how many different phenotypes? The mother is also a silent carrier of the defective FMO3 allele. A man who is a silent carrier of the FMO3 “fish odor syndrome” has children by a woman who is “normal.” Which of the following would best …

Telophase I At this stage of meiosis I, the sister chromatids have reached their respective poles, and they then decondense prophase In _______ I of meiosis, the replicated chromosomes condense, the homologous chromosomes form bivalents, and crossing over occurs 4 cells, gametes, haploid cells The resulting products of meiosis II include? anaphase During _____ I …

C. Meiosis 1 Alleles for the same trait separate during a. fertilization b. mitosis c. meiosis 1 d. meiosis 2 C. 24 If an organism has 24 chromosomes in its autosomal cells, its diploid (2N) number is a. 6 b. 12 c. 24 d. 48 A. Phenotype The physical appearance of an individual is its …

interphase,prophase,metaphase,anaphase,telophase The correct sequence of the stages in the cell cycle is… chromosomes line up on the midline of the cell During metaphase… A. the nuclear envelope breaks up B. cytokinesis occurs C. tetrads form D. centromeres divide E. chromosomes line up on the midline of the cell centromeres divide Which of these events occurs …

Clone the plant asexually to produce an identical one. If a horticulturist breeding gardenias succeeds in having a single plant with a particularly desirable set of traits, which of the following would be her most probable and efficient route to establishing a line of such plants? the complete set of an organism’s genes Which of …

The answer is: crossing over. Genetic recombination takes place in which of the following processes? Select one: a. alignment of tetrads in metaphase I b. random alignment of homologous chromosomes in meiosis I c. crossing over d. anaphase I of meiosis The answer is: sexual reproduction. Which of the following types of reproduction is associated …

The complete complement of an organismʹs genes What is a genome? A) The complete complement of an organismʹs genes B) A specific set of polypeptides within each cell C) A specialized polymer of four different kinds of monomers D) A specific segment of DNA that is found within a prokaryotic chromosome E) An ordered display …

1. one member of each homologous pair at each pole 2. each chromosome is a monad 3. each monad has maternal and paternal DNA due to crossing over telophase II 1. sister chromatids of each dyad are pulled to opposite poles anaphase II 1. centromeres on equatorial plate 2. shugoshin complex degraded and centromeres separate …

face opposite spindle poles. During meiosis I, the homologous chromosomes of a tetrad two chromosomes with two sister chromatids each. A tetrad is composed of 47, XY, trisomy 21 Down syndrome is associated with which of the following karyotypes? gene – allele – chromosome Which of the following lists is in the correct order, from …

germ-line cells. In animals, cells that will eventually undergo meiosis to produce the gametes are set aside early in the course of development. These cells are called meiosis I. The number of chromosomes per cell is reduced from two sets to one set during breakdown of nuclear envelope, condensation of chromosomes, and movement of centrosomes …

each hereditary unit is inherited separately from other hereditary units Mendel’s theory of independent assortment states that alleles for different traits were inherited independently Mendel’s dihybrid crosses, but not his monohybrid crosses, showed that were pure-breeding Mendel found that pea plants expressing a recessive trait the plant can self-fertilize The pea plant was an excellent …

All of the sons, and none of the daughters, are color-blind. A color-blind woman mates with a male with normal color vision. Which of these results would indicate that color blindness is caused by an X-linked recessive allele? XCXc Color blindness is an X-linked recessive trait. A color-blind man has a daughter with normal color …

Growth and Repair Purpose of Cell Reproduction Reproductive cells that have half the number of chromosomes. Meiosis Ovaries and testes in animals. Sex Organs Chromosomes come together to form a tetrad. Homologous Two chromosomes attached to each other. Tetrad Alternate forms of the same gene. Alleles Chromosomes that contain the same genes although each chromosome …

Gametes What is the term that refers to the egg or sperm of an organism? Zygote When an egg and sperm fuse, the resulting single cell is called a Fertilization The fusion of gametes to form a new cell is called ____, or syngamy. Meiosis What type of cell division reduces the number of chromosomes …