Answer:
The correct answer is - 3/16 or 18.75% portion will be resistant to both Bt and DDT.
Explanation:
It is given that bollworms that are susceptible to Bt are represented by either RR or Rr and resistance one are shown by rr genotype and bollworms that are resistant to DDT are represent TT or Tt genotype and susceptible to DDT have tt genotype.
Cross: RR tt with rr TT
Gametes: Rt and rT
F1 cross:
RT
rT RrTt ( susceptible Bt and resistant DDT)
F1 Cross with F1
Gametes: RT, Rt, rT and rt
cross:
RT Rt rT rt
RT RRTT RRTt RrTT RrTt
Rt RRTt RRtt RrTt RrTt
rT RrTT RrTt rrTt rrTt
rt RrTt Rrtt rrTt rrtt
The bold genotypes are the three out of 16 that are resistant to both DDT and Bt.
If pea plant cells contain 14 chromosomes, a pea plant's gamete cell contains 7 chromosomes.
<h3>Describe chromosomes.</h3>
Chromosomes are a pair of thread-like structures that are found in cells.
Re genes and a person's personality are found on the chromosomes.
Meiosis causes the daughter cells to contain half of each chromosome.
<h3>What does a chromosome do primarily?</h3>
Chromosomes' primary role is to transport DNA, which is the building block of all genetic material. DNA contains the genetic instructions for a number of cellular processes. These activities are necessary for the organisms' development, maintenance, and procreation. Chromosomes are shielded by proteins like histones.
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Answer:
Predators are animals that hunt and kill other animals for food. Both carnivores and omnivores can be predators. The other classification of carnivores and omnivores is scavengers, which means they feed off of animals that are already dead. Predators include lions, sharks and eagles.
The first answer is correct. rRNA makes up ribosomes along with other protiens. rRNA stands for ribosomal ribonucleic acid