Fundamentals of DNA
Where is the location of DNA in the cell?
Nucleus (细胞核)
Meiosis
Are the following genotypes homozygous (纯合子) or heterozygous (杂合的)?
TT
Tt
tt
Homozygous (纯合子)
Heterozygous (杂合的)
Homozygous (纯合子)
The Central Dogma of Biology states that information stored on __________ is copied into ___________, which is used to make ______________.
DNA (脱氧核糖核酸), RNA (核糖核酸), Protein (蛋白质)
The purpose of mitosis is for _______________.
Growth and repair.
State an example of a gene along with two possible alleles.
i.e.
Gene: Eye Color
Alleles: Brown Eye, Blue Eye
DNA that is wrapped up tightly forms structures called _____________. Individual sections of these structures are called ___________.
Chromosomes (染色体); Genes (基因)
In meiosis, a (DIPLOID/HAPLOID) cell becomes 4 (DIPLOID/HAPLOID) cells
Diploid (二倍体); Haploid (单倍体)
Using the letter "B", determine the possible genotype(s) of an individual with...
Dominant Phenotype
Recessive Phenotype
Dominant: Bb or BB
Recessive: bb
The human body has ________ total individual chromosomes and ________ pairs of chromosomes.
46; 23
In mitosis, a (DIPLOID/HAPLOID) cell becomes 2 (DIPLOID/HAPLOID) cells
Diploid (二倍体); Diploid (二倍体);
If a heterozygous parent breeds with a homozygous recessive parent, determine the percentage of offspring that will have a dominant phenotype.
50%
Draw a sketch of...
1. One pair of homologous chromosomes after DNA replication
2. Two pairs of homologous chromosomes before DNA replication
Mr. Riebock checks!
Is DNA replicated before mitosis and meiosis? Justify your answer!
In both processes, cells must produce an identical copy of DNA before it can be given to offspring.
Parent 1 and Parent 2 have the dominant phenotype. Their first child has the recessive phenotype. If they have 12 offspring, predict the number of offspring that will have the recessive phenotype.
Both parents are heterozygous, the probability is 25%. The predicted number out of 12 is 3 offspring.