Meiosis/Genetics Study Guide
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An organism’s Physical characteristics, such as seed color or eye color, are the organism’s….
Phenotype
The end result of meiosis is…….
4 haploid daughter cells
Which cells undergo meiosis?
Sperm cells or egg cells (gametes)
Which phase of Meiosis does crossing over happen?
Prophase I
Meiosis is a type of cell division that produces?
Gametes
Who is the father of genetics?
Mendel
What is the difference in heterozygous and homozygous
Homozygous means having the same alleles while heterozygous means having different alleles.
What law states that during gamete formation genes for different traits separate without influencing each other’s
inheritance (i.e. just because I can roll my tongue doesn’t mean that I can snap my fingers)
Law of independent assortment
An individual who is heterozygous for two genes is represented? You choose the letter!
AaBb
How many genetically different kinds of gametes will an individual with the genotype AAbb produce?
1
Round seed is dominant over wrinkled seed in pea plants. If homozygous, round seeded peas are crossed with wrinkled
seeded plants, the offspring will be:
All round
In garden peas the tall allele (D) is dominant over the dwarf allele (d), and the green pod allele is dominant (Y) over the
yellow pod allele. What is the genotype of a heterozygous tall, homozygous green pod pea plant?
DdYY
In garden peas the tall allele (D) is dominant over the dwarf allele (d), and the green pod allele is dominant (Y) over the
yellow pod allele. What is the genotype of a heterozygous tall, heterozygous green pod pea plant?
DdYy
A recessive gene can be expressed if the genotype is:
Homozygous recessive
Which of the following characteristics contribute to genetic variation
A. Chromosome number
B. Crossing over
C. Meiosis
D. Random Mating
E. Answers B, C, and D
Situations in which one allele for a gene is not completely dominant over another allele for that gene, for example red X
white making a pink flower, are called
Incomplete Dominance
A cross of a red cow (RR) with a white bull (WW) produces offspring with red and white spots (RRWW). This type of
inheritance is known as
Codominance
In humans, the male has which sex chromosomes
One X and one Y
19. Hemophilia and colorblindness are both ___________________________________ traits.
Sex-linked
20. Which of the following is determined by multiple alleles?
A. Rh factors
B. ABO blood typing
C. Sex-linked traits
D. All traits are determined this way
21. In a pedigree the
represents female while the
represents that these individuals are affected.
represents male If there is a shaded circle or square it