The drier the air outside a leaf, the faster is water lost from the leaf through the stomata
Indicate whether the statement is true or false
TRUE
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You are studying a new species of plant similar to Mendel's pea plants. You are specifically interested in two genes that are located on two different chromosomes. In this plant, the gene for height has two alleles, T (tall) and t (short)
The gene for leaf color has two alleles P (purple) and p (pink). What meiotic products do you expect from diploid cells that are homozyous for the tall allele and heterozygous for the purple allele? A. An equal number of Tp, tP, tp, and TP gametes B. An equal number of TP and Tp gametes C. An equal number of TP and tp gametes D. 2 TP gametes for every 1 Tp gamete
Which of the following is not a symptom of Down syndrome?
A. flat face B. short stature C. eyelid fold D. indeterminate genitalia E. stubby fingers
How is codominance expressed in an organism?
A) Both of the alleles in a heterozygote are expressed phenotypically in an individual. B) Expression of two different alleles alternates from one generation to the next. C) A heterozygote expresses an intermediate phenotype. D) Offspring exhibit several different phenotypic expressions of a single trait.
In Drosophila, there are 2 linked genes, one that has a wild type allele for red eyes (p+) and a mutant allele for purple eyes (p) and the other gene is for wild type normal wings (vg+) and mutant vestigial wings (vg). If a test cross is conducted with a cis (coupling) heterozygote fly and a double mutant, you obtain a 24% recombination frequency. Based on this information, what percentage of red, normal winged flies would you expect to see in this cross?
a) 76% b) 38% c) 12% d) 24%