Genetic Vocab
different versions of a trait
alleles
physical appearance of a trait
phenotype
1
How many traits are looked at in a dihybrid cross?
2
*general science*
how many elements are on the periodic table?
118
having two different alleles
heterozygous
letter combination of a trait
genotype
Qq x QQ
quiet bark is dominant over loud bark in dogs
create a Punnett square to predict the potential offspring and a genotype/phenotype t-chart
QQ - 50%
Qq - 50%
quiet bark - 100%
How many squares are in a dihybrid cross Punnett square?
16
*general science*
what is the largest rodent in the world?
capybara!
allele that is masked - need two to have this trait
In dogs, grey fur is dominant over white fur. What letters would you use for the dominant and recessive traits?
G - dominant (grey fur)
g - recessive (white fur)
speckled skin is dominant over solid skin in lizards. A homozygous recessive female crosses with a heterozygous male. Create a Punnett square and genotype/phenotype t-chart for the offspring possibilities
Ss - 50%
ss - 50%
speckled skin - 50&
solid skin - 50%
purple, tall pea plants are dominant traits over white, short pea plants.
PPTt x ppTt are crossed. Complete a Punnett square and genotype/phenotype t-chart
P_T_ - 12:16 (3:4) - purple,tall
P_tt - 4:16 (1:14) - purple, white
*general science*
how long is one day (one axis rotation) on Mercury?
58 Earth days
States that there are two factors that determine each trait - each of these factors separate during gamete formation
Law of Segregation
GG, HH, DD are examples
homozygous dominant
ms. arens will draw a Punnet square on the board - you need to determine parent 1 and parent 2's genotypes and phenotypes
T = taster
t = nontaster
parent 2 - tt
In cats:five toes are dominant to 6 toes and green eyes are dominant to yellow eyes
Two heterozygous five toed/green eyed cats cross. What are the genotype/phenotype ratios of their offspring?
F_G_ - 9:16 - five toes, green eyes
F_gg - 3:16 - five toes, yellow eyes
ffG_ - 3:16 - six toes, green eyes
ffgg - 1:16 - six toes, yellow eyes
*general science*
what is the rarest blood type (less than 1% of the population has this)
AB-
States that during gamete formation, each pair of alleles separates independently from one another
Law of Independent Assortment (second law)
G/g are the allele versions for a trait. Give a possibility for the dominant and recessive physical traits
G - green, grey (anything that starts with g)
g - any other color
two heterozygous parents for freckles cross. what percent of their offspring will not have freckles?
25% (ff)
In mice, black fur (B) is dominant over grey fur (b) and long tail (L) is dominant over a short tail (l)
Cross: BbLl ×bbLl
give the percentages/rations of the genotypes/phenotypes of their offspring
B_L_ - 6:16 (3:8) - black fur, long tail
B_ll - 2:16 (1:8) - black fur, short tail
bbL_ - 5:16 - brown fur, long tail
bbll - 3:16 - brown fur, short tail
*sports*
what's the fastest marathon time ran by a man?
2:00:35
(that's a 4:35/mile)