Genetics Answers

What change in the climate may have helped more soay sheep to survive winters?

how does the genetic code allows proteins to be synthesised

with minimal errors taking place? Thanks.

List down all the possible types of gametes produced by the following individuals with

           genotypes:

a.        TtTT

b.        CcDd

c.        GGHhIi

d.        CcDd

In a pea plant the allele for puple flowernis dominant to the allele for white flower if a white color flowered plant is crossed with a heterozygouos purple plant what would be the genotype and phenotype ratios

The desert plant Welwitschia mirabilis (Figure 1) is an extraordinary plant, that can survive in the hot, desert where other plants can't survive. On the other hand, food crops have little to no drought resistance or tolerance. The majority of food crops are annuals. In nature, such plants grow only in the rainy seasons, when temperatures are appropriate for vegetative growth; in agriculture, it's called the "growing season”. The Minister of Agriculture, Water, and Forestry has hypothesized that putting Welwitschia mirabilis plant’s survival skills into maize will make it drought tolerant and expand cultivation of maize to marginal arid areas of Namibia.

Imagine, you have been engaged by the Minister of Agriculture, Water, and Forestry as a scientist to make use of the Welwitschia mirabilis surviving skills to develop a maize variety that is drought tolerant, kindly detail all the steps to the Minister on how you would intend to come up with such a maize variety.

observe the following offspring proportions: 

tall/inflated: tall/constricted: dwarf/inflated: dwarf/constricted in a 9:3:3:1 ratio. 

Notice from the grid that when considering the tall/dwarf and inflated/constricted trait pairs in isolation, they each inherited in 3:1 ratios as expected with a monohybrid cross. 

Use headers to label each part of your experiment.

Test the hypothesis: cross the dwarf and tall plants and then self-cross the offspring. What precautions in the crosses and in growing the plants? 

Analyze data: You observe the following plant phenotypes in the F2 generation: 2706 tall/inflated, 930 tall/constricted, 888 dwarf/inflated, and 300 dwarf/constricted. Reduce to a ratio and determine if they are consistent with Mendelian laws. Were the results close to expected 9:3:3:1 phenotypic ratio? the results support the prediction? What is observed if far fewer plants were used, given that alleles segregate into gametes? what if windy? 

Asses the possibility of errors occurring during the stages of protein synthesis, particularly during transcription and translation .analyse the cause and effect of genetic mutation in DNA including Missense,Nonsense,Silent,insertion,deletion,duplication,frameshift