The most highly sensitive time within the developing embryo for the risk of malformation related to environmental teratogens is cleft palate at 8 weeks gestation. It is an opening in the roof of the mouth.
A teratogen is any substance and/or physical agent that may cause an irreversible abnormality in the structure of the developing embryo or fetus (e.g., classical pesticides such as DDT).
Cleft palate is a malformation mainly caused by mutagenic agents (teratogens) during pregnancy, which affects approximately one (1) of 650 births.
A cleft palate is a malformation that occurs when the two plates of the skull that form the roof of the mouth cannot be completely joined.
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Answer:
The fragment and plasmid are both cut with the same restriction enzyme.
Explanation:
To insert a piece of DNA in a bacterial plasmid, we need to cut both plasmid and DNA insert from same regions. This is typically done by restriction enzymes or restriction endonuclease. This cutting will open the plasmid (which is circular initially) and produce <u>sticky ends.</u> Here, DNA insert can attach because of similar sequence (see attached figure). In the final step, DNA ligase will glue it in the plasmid and it will become its part. This technique has been extensively used as a DNA recombinant technology. A better representation can be seen in the attached figure where both DNA sequence of interest and plasmid are cut with the same restriction enzyme (shown as scissors) and then ligated with DNA ligase.
One thing a person can do is plant more plants a year.
Answer:
32%
Explanation:
Since the population is in Hardy-Weinberg equilibrium, the allele and genotype frequencies will remain constant over generations.
The frequency of the recessive allele (q)= 0.20
Since p+q= 1
so, p= 1-q
and p=1-0.20= 0.80
The frequency of heterozygous genotype (2pq) = 2 x 0.20 x 0.80 = 0.32 or 32%
Therefore, the expected frequency of heterozygous genotype in the next generation would be 32%.
Answer:
Coal
Explanation:
Helped work become faster.
