If an organism shows the recessive trait, is it heterozygous or homozygous?
Homozygous
10) A TT (tall) plant is crossed with a tt (short plant). What percentage of the offspring will be tall?
4/4 - all - 100%
In penguins, redd are dominant to orange feet. What are the possible off spring phenotypes and probabilities of a homozygous dominant mother and a heterozygous father?
100% red
The study of genetics is called...
heredity
Dominant alleles are represented by what type of letter?
Capital or "big" letter
If an organism is heterozygous, does it show the dominant or recessive trait?
Dominant
Give an example of homozygous dominant genotype using the letter "D"
DD
12) A heterozygous round seeded plant (Rr) is crossed with a homozygous round seeded plant (RR). What percentage of the offspring will be homozygous round?
2/4, 50%
13) A homozygous round seeded plant is crossed with a homozygous wrinkled seeded plant. a. What are the genotypes of the parents?
RR and rr
On a Punnett Square, the parents are located on....
the top and side
If the parent is heterozygous, is their phenotype dominant or recessive?
Dominant
Alleles are represented by....
letters
A gene is...
determines the phenotype
all of the mentioned
a set of intsructions
segment of DNA
13) A homozygous round seeded plant is crossed with a homozygous wrinkled seeded plant. b. What percentage of the offspring will also be homozygous?
0%
Give an example of the three (3) options of the genotypes using the letter "T"
TT, Tt, tt
Recessive alleles are represented by what type of letter?
Lowercase or "little"
The different forms of a gene are called...
alleles
In leprechauns, orange hair is dominant to green hair. If you use the letter "H", what genotypes would result in orange hair?
HH. Hh
11) A Tt plant is crossed with a Tt plant. What percentage of the offspring will be short
1/4, 25%
On a Punnett Square, each box represents what percentage?
25%
If a plant with purple flowers is crossed with a plant that has white flowers and ALL the offspring have purple flowers, which color is dominant?
Purple
An organism with 2 identical alleles for a trait is considered
homozygous (purebred)
Long stalks in some plants are dominant to short stalks. Using the letter "L", what are the possible genotypes of a heterozygous mother and a recessive father?
Ll and ll
When you need to determine if an organism is homozygous or heterozygous. what need to cross if with a recessive organism and look at the offspring. Why?
If there are any offspring showing the recessive trait, the dominant individual must be carrying the recessive allele - heterozygous
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