Answer: one offspring out of the four will have a recessive-recessive genotype.
Explanation: A cross between two parents who are heterozygous for a gene that has a simple dominant-recessive pattern of inheritance will produce four offsprings: one will be homozygous dominant, two will be heterozygous dominant while one will be homozygous recessive.
Homozygous dominant offspring has two dominant alleles, heterozygous dominant offspring has one dominant allele and one recessive allele while a homozygous recessive offspring has two recessive alleles.
For example, a cross between two parents that are heterozygous (Tt) for tall will produce one TT, two Tt and one tt. TT is homozygous dominant, Tt is heterozygous dominant and tt is homozygous recessive. An offspring with genotype tt has a two recessive alleles thus have a recessive-recessive genotype. Therefore the number of offsprings with recessive-recessive genotype is one.
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Answer:
A. DNA polymerase
Explanation:
DNA polymerases (I,II,III) proofread the DNA, which helps to catch errors. Errors can be fatal to expression, creating misformed proteins or unclear information, so this is necessary.
Fun facts - the coronavirus is a retrovirus, so it doesn't proofread. That makes it much harder to find a vaccine, because it can generate new strains by the very fact of not proofreading.
We cannot drink water and water can damage the ecosystem. Water pollution can be reduced by adding filters to rivers.
The Meiosis Gizmo is an intuitive movement, which helps understudies through the steps of meiosis offspring utilizing crossovers and meiosis.
<u>Explanation:</u>
It explains how sex cells division that produces reproductive cells in sexually reproducing organisms produced by the process of meiosis. Compare meiosis in male and female germ cells, and use hybrids to expand the number of conceivable gamete genotypes.
Utilizing meiosis and crossovers, create "designer" fruit fly offspring with wanted attribute mixes. During meiosis, a few chromosomes swap portions of themselves, making new blends of qualities and expanding the hereditary decent variety of the sex cells.
Answer:
functions as adhesion and address loci for cells.
Carbohydrates protect the cell by forming a glycocalyx, which is especially strong in bacteria and enables biofilms to form.
Explanation:
