16. In peas, tall plants (T) are dominant to short (t) and
purple (P) is dominant...
16. In peas, tall plants (T) are dominant to short (t) and
purple (P) is dominant to white flower color (p). What are the
phenotypes of cross between ttPp and TtPP?
Solutions
Expert Solution
Ans : tall and purple and short, purple plants will be produced
on crossing ttPp×TtPP
Phenotype is the physical characteristic produced by a genotype
(genetic composition).
Alternative forms of a gene are known as alleles for example
'T' and 't' are two forms of the height governing gene which
produce two different phenotypic effects I.e tall and short
respectively.
A dominant allele(T or W) is the one whose phenotypic effect is
produced in heterozygous condition(Tt or Pp) i.e. in heterozygous
condition it nullifies the phenotypic effect of the recessive
allele(t or p).
A recessive allele is the one whose phenotypic effect is
produced only when it is present in homozygous condition ( tt or
we) because in heterozygous condition (Tt and Pp) phenotypic effect
of recessive allele is nullified by the dominant allele(T or
P).
1. Tall (T), Purple (P), and Round (R) are dominant to Short
(t), White (p), and Wrinkled (r). The following pea plants were
crossed (TtPpRr X ttpprr) and produced the offspring below:
Phenotypes of offspring
Number of offspring
Tall White Wrinkled
7
Short White Wrinkled
48
Tall White Round
98
Tall Purple Wrinkled
29
Tall Purple Round
42
Short Purple Wrinkled
102
Short Purple Round
13
Short White Round
31
a. Determine the arrangement of alleles on the
homologous chromosomes...
In garden peas, tall plants are dominant to short plants and
smooth seeds are dominant over wrinkled seeds. If two heterozygous
tall plants with smooth seeds (TtRr) are crossed, what are the
potential genotypes and phenotypes that can be expected in the
offspring? What is the genotype of the parents? What are the
gametes for each parent? What is the phenotypic
ratio? What proportion of the Tall plants with smooth seeds is
heterozygous for both traits?
In peas, tall (T) is dominant to short (t),
yellow (Y) is dominant to green (y) and round
(R) is dominant to wrinkled (r). A purebreeding
plant with tall, green and wrinkled pea phenotypes is crossed to a
purebreeding plant that is short and makes yellow, round peas. When
peas from this F1 generation are crossed, what is the probability
of obtaining a short plant that makes yellow, wrinkled peas in the
F2?
Let P = purple flowers and p = white, and T = tall plants and t
= dwarf. What are the genotypes of the gametes that are produced by
a plant that is heterozygous for both traits?
a. PpTt only
b.PT and pt
c. P, p, T, and t
d. PT, Pt, pT, and pt
e. Tt, TT, tt, Pp, PP, and pp
In violets, purple is dominant to white and tall stems are
dominant to short stems. . A tall purple plant that is heterozygous
at both loci is crossed with a double homozygous recessive plant.
What is the probability of obtaining either a tall white plant or a
short purple plant? What percent of the offspring are expected to
be heterozygous at one or both loci? What will be the expected
ratio of the F2 offspring of the F1 generation?
In pea plants, tall (T) is dominant over short (t). What are
the genotypes and phenotypes of the offspring of a cross between a
TT and a tt plant?
Genotype____________
Phenotype___________
In garden pea plants, tall stem length (T) is dominant
over short stem length (t). In an ideal garden pea plant
population exhibiting Hardy–Weinberg equilibrium, if allele
T has a frequency of 0.88, what percentage of the
population is recessive for this trait? Round your answer to the
nearest whole number.
--------
There is a lack of dominance in black (B) and white
(W) horse coat colours. An offspring produced from a black
horse and a white horse has a...
Here are the phenotypes for the following genotypes (capital
letters are dominant): T tall, t short, S smooth kernel, s wrinkled
kernel, R purple kernel, r yellow kernel. The resulting F1s are
test-crossed and you get the following results: Use an extra page
or the back if you need more space- just make sure to scan and send
me all work)
tall smooth purple 65 tall smooth yellow 12 tall wrinkled purple
451 tall wrinkled yellow 123 short smooth purple...
in
peas puppe flowers are dominant to whote flowers. a homozygous
purple flower is crossed to a whitw flower. what proportion of
their offspring should be predicted to be white
and where does alternative mRNA SPLICING occur?
In pea plants, purple flower color is dominant over white. If
one sees a purple pea plant and has no prior knowledge of its
ancestry, what can be said its genotype?
A. It is pp
B. It is Pp
C. It is PP
D. It is either PP or Pp