Which of these would be a valid hypothesis? Select one: a. Humans are controlled by forces beyond our understanding. b. Humans and bacteria share a common genetic code. c. Humans should help in the conservation of other animal species. d. Humans are responsible for the sustainable use of resources. e. Human history is determined by a series of supernatural events. Feedback Your answer is correct. Question 2 Incorrect Mark 0.00 out of 2.00 Flag question Question text A hypothesis
Premium Cell DNA Eukaryote
begins to fade from view. _____ 3. A new nuclear membrane is forming around the chromosomes. _____ 4. The cytoplasm of the cell is being divided. _____ 5. The chromosomes become invisible. _____ 6. The chromosomes are located at the equator of the cell. _____ 7. The nuclear membrane begins to fade from view. _____ 8. The division (cleavage) furrow appears. _____ 9. The chromosomes are moving towards the poles of the cell. _____ 10. Chromatids line
Premium Mitosis Chromosome
Prophase I Early Prophase I D.N.A coils tightly and individual chromosomes become visible as single structures Homologous chromosomes become associated in synapsis. Each pair of chromosome is called a bivalent. Centrioles divide and move to the opposite poles of the cell‚ and spindles start to form Late Prophase I The bivalents duplicate to form tetrads (four-chromatid groups).The nuclear membrane disintegrates. Chromosomes join at points called chiasmata where crossing over takes place.
Premium Mitosis Chromosome Meiosis
cytologist Pierre-Joseph van Beneden discovered that the gametes of the roundworm Ascaris contained two chromosomes while somatic cells contained four. B. Fertilization 1. van Beneden proposed in 1887 that an egg and sperm could fuse to form a zygote. 2. The fusion of gametes is called fertilization or syngamy. C. Meiosis 1. A reduction division is required to reduce the number of chromosomes to half so sexual reproduction can occur. 2. This reduction division is known as meiosis. D. The Sexual
Premium Chromosome Mitosis Meiosis
Cri Du Chat Syndrome Introduction Cri du chat syndrome also known as 5p syndrome and cat cry syndrome - is a rare genetic condition that is caused by the deletion (a missing piece) of genetic material on the small arm of chromosome 5. Cri du Chat is a genetic disorder first described and named in 1963 by Jerome Lejeune. Cri-du-Chat means "cat’s cry" in French. The disorder causes the baby to produce a high pitched and cat like cry because of the structural abnormality and low
Premium Chromosome Down syndrome
ortMedical Magnet Biology Summer Assignment Using half of a 3 x 5 index card‚ place the vocabulary word on the front (no lines) and the definition on the back (lines). Write legibly. Next‚ draw a picture on the FRONT of the card that helps you remember the DEFINITION. For example‚ for
Free DNA Cell Chromosome
General Biology In Class Quiz - Chapter 5 10 points 1. Explain the difference between chromatin‚ chromosome‚ nucleosome and histones. Chromatin- is the combination of DNA‚ histone‚ and other proteins that make up chromosomes. Chromosome- is minimally very long continuous piece of DNA which contains many genes regulatory elements and other intervening nucleotide sequences. Nucleosome- is considered to be one of the most stable particles in the DNA that helps in the compacting and transcripting
Premium DNA Chromosome Gene
replicating its DNA. After the DNA is replicated‚ the chromosomes line up in the middle of the cell where each pair touches each other and genetic information from the alleles are shuffled and exchanged‚ a process called crossing-over. The crossing-over over of chromosomes results in what is called recombination‚ where genetic information from the maternal chromosome (chromosome from the mother) is now on the paternal chromosome (chromosome from the father) or vice versa. Crossing-over and recombination
Premium DNA Chromosome Gene
Mitosis is a cellular process that replicates chromosomes and produces two identical nuclei in preparation for cell division‚ from the original cell two cells are derived‚ each of which possesses the same genetic material. Mitosis has five phases: interphase‚ prophase‚ metaphase‚ anaphase and telophase. Interphase The DNA duplicates during interphase to prepare for mitosis. Chromosomes are not clearly discerned in the nucleus. Prophase Chromatin in the nucleus begins to condense and becomes visible
Premium Mitosis Cell cycle Chromosome
that occur in a regular recognizable pattern are referred to as syndromes--for example‚ the FETAL ALCOHOL SYNDROME sometimes observed in infants of mothers who drank heavily when pregnant. Birth defects may result from the action of genes‚ chromosomes‚ or the environment on the developing fetus‚ but often the cause cannot be determined. Inherited Defects Abnormal genes cause a significant number of different birth defects. Some can be identified as a single-gene disorder that is inherited
Premium Chromosome