Biology ACP Review, Top Exam Questions and answers, Graded A+

Biology ACP Review, Top Exam Questions and answers, Graded A+ sexual reproduction includes - fertilization normal human females develop from fertilized eggs containing which of the following sex chromosome combinations? - XX homologous chromosomes are pairs of chromosomes containing genes that code for - the same traits in humans, somatic contain __________ autosomes and ________ sex chromosomes - 44 autosomes and 2 sex chromosomes the X and Y chromosomes are called - sex cells how many chromosomes are in the body cells of an organism that has a haploid number of 6? - 12 a haploid cell is one that has________set of chromosomes - one the exchange of segments of DNA between the members of a pair of chromosomes acts as a source of _____________________ - variations within a species crossing-over occurs - during prophase 1 the process in which chromosomes go through first and second division is also known as - meiosis separation of homologues occurs during - meiosis 1 when crossing over takes place, chromosomes exchange ________________________ - segments of DNA the difference between anaphase of mitosis and anaphase 1 of meiosis is that - homologous chromosomes separate in anaphase 1 an allele that is always expressed whenever it is present is called - dominant the genotype of an organism is its ______________________ - genetic composition heterozygous for the trait - if an individual possesses a dominant and a recessive allele for the same trait, the individual is said to be fertilization of the haploid sperm and egg results in the restoration of the __________________ number of chromosomes in the zygote - diploid chromosomes that are not involved in sex determination are called - autosome the X and Y chromosomes are called the ________________ chromosomes - testes in humans, a zygote with XX chromosomes will result in a _____________________ - female zygote somatic cells containing two sets of 23 chromosomes each are always _____________ - haploid the stage of meiosis during which homologues line up along the equator of the cell is called ___________________ - metaphase 1 after a new nuclear membrane forms during telophase I of meiosis, the _______________ divides, resulting in two cells - cytoplasm the process called __________________ guarantees that the number of chromosomes in gametes is half the number of chromosomes in body cells - meiosis Prophase I of meiosis is different from prophase of mitosis in that every chromosome pairs with its ________________________ - homologous chromosome the cells resulting from meiosis in either males or females are called _____________ - gametes different forms of a particular gene are called _____________ - alleles an organism's ________________ refers to the set of genes it has inherited - genotype the physical traits of an organism as determined by what alleles are present is the ______________ - phenotype Prophase I of meiosis is different from prophase of mitosis in that every chromosome pairs with its ________________________ - homologous chromosome the cells resulting from meiosis in either males or females are called _____________ - gametes what happens during the S stage? - DNA makes copies of nuclear DNA what happens before the S stage