Genetics Answers

X represents the allele for the dominant phenotype and x represents the allele for the recessive phenotype (it is convention that the dominant phenotype is represented by a capital letter). The shaded area on top represents one parent and the shaded area on the left represents the other parent. The possible offspring are represented by the central, unshaded boxes, with each parent donating one allele to form the genotype of the offspring. The phenotype of the offspring depends on the relationship between the two alleles.
Use the following Punnett square to analyze your results for the F2 generation. Define the symbols that you will use for each allele and fill in the (the shaded area will contain the alleles donated by each parent). Define your symbols here:

The genotals for rabbit fur are as follows:
A. Dark gray: CC, CCCH, CCH, Cc
B. Chincilla: CCHCCH, CCHCH, CCHc
C. Himalayas: CHCH, CHc
D. Albino white: cc

What are the results of the crosses, what is the comparison of results, and what are their genotypes and phenotypes?
A. Dark gray (CC) with Chincilla (CCCH)
B. Dark gray (CCH) with Himalayas (CHCH)
C. Chincilla (CCHc) with Himalayas (CHc)

What is the probability of a couple (XX and XY) having three daughters in a row?

In watermelons, the green colour gene (G) is dominant over the striped colour gene (g), and round shape (R) is dominant over long shape (r). A heterozygous round striped watermelon plant is crossed with a long heterozygous green colour plant. Determine the expected phenotypic ratio of the F1 generation.

. Located on the X chromosome of a cat is a gene that codes for deafness. This gene is recessive. A heterozygous female cat is crossed with a male cat that is deaf. Show this cross. What percentage of their offspring will be deaf? (4 points)


draw then punnett square




Question Answer:

two homozygous foxglove plants were hybridized and F1 family produced. one parent had dark red flowers(DDww) and the other had white flowers (ddWW) The F1 population (white flowers) was self-pollinated and 300 F2 progeny were examined. The following was numbers of phenotypes were observed. white 255, red 57, pink 18 and the total 300. a) phenotype ratio b) type of epistatic interaction c) complete an appropriate analysis to explain and interpret this segregation pattern

Why is ploidy more common in plants?

Describe in detail, replication in linear plasmids and DNA.