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T/F: twenty-three chromosome pairs in a human karyotype are similar in size and shape in a human male. (Change wording if wrong)

false, twenty-two

T/F: in a human karyotype, forty-four of the chromosomes are autosomes.


T/F: in humans, the mother determines the sex of the offspring

false, father

T/F: if a organism has 16 chromosomes in each of its egg cells, the organism's diploid number is 8.

false, 32 (for diploid number)

the number of chromosomes in a gamete is represented by the symbol ___


Which of the following represents a female?


Gametes are produced by the process of _____


When during the cell cycle are chromosomes visible?

only during cell division

Unlike mitosis, meiosis results in the formation of ____ cells


Which of the following happens when a cell divides?
-the cell's volume increases
-it becomes more difficult for the cell to get enough oxygen and nutrients
-the cell has DNA overload
-each daughter cell receives its own copy of the parent cell's DNA

each daughter cell receives its own copy of the parent cell's DNA

how many chromosomes are shown in a normal human karyotype?


If an organism's diploid number is 12, its haploid number is ___


During normal mitotic cell division, a parent cell having 4 chromosomes will produce two daughter cells, each having ____ chromosomes


DNA is copied during a process called ____


human females produce eggs that have ___

1 X chromosome

During DNA replication, a DNA strand that has the bases CTAGGT produces a strand with the bases ____


Gametes have _____

one allele for each gene

in eukaryotes, DNA is located ____

in the nucleus

because of base pairing in DNA, the percentage of _______ molecules in DNA is _____ to the percentage of thymine molecules

adenine, equal

in humans, a male has _____

1 X chromosome and 1 Y chromosome

DNA replication results in two DNA molecules, each with _______

one new strand and one original strand

The Watson and Crick model of DNA is a(n) ____, in which two strands are wound around each other.

double helix

The different forms of a gene are called ____


An organism's gametes have _____ the number of chromosomes found in the organism's body cells


How many sets of chromosomes are in a diploid cell?

2 sets (2n)

What would the effect be if the gametes of a species had the same number of chromosomes as the species' body cells?

during fertilization, a 2n cell and a 2n cell would combine, creating a 4n zygote

What happens to the number of chromosomes per cell during meiosis?

it is reduced to N, half its original number

homologous chromosomes

chromosome pairs with the same genes, but possibly different alleles


picture of someone's chromosomes

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