Genetics Questions

Could this trait be X-linked recessive?

If a diploid organism has two different alleles for a gene, that organism is ___________ with respect to that gene.HomozygousHeterozygousHaploidDioecious

In the cross AaBb x AaBb, what proportion of the offspring would be expected to be heterozygous for both genes? (Assume independent assortment.)1/41/21/31

According to Mendel's second law, an organism with genotype AaBb will produce what combination of gametes? (Assume independent assortment).Gametes with genotypes A, a, B, and b in theoretically equal numbersGametes with genotypes AB and ab in theoretically equal numbersGametes with genotypes AB, Ab, aB, and ab in theoretically equal numbersGametes with genotypes Ab and aB in theoretically equal numbers

Diploid cells of a typical mammalian female would contain ____ Barr bodies per cell.01234

In humans, the heterogametic sex isMales (XY)Females (XX)

Sex-limited and sex-influenced traits are caused by genes that are located on sex chromosomes.TrueFalse

Could this trait be autosomal dominant?

When performing the cross Aa x Aa, the genotypic ratio of the offspring is expected to be1:2:1 AA:Aa:aa3:1 AA:aa9:3:1 AA:Aa:aa3:13 AA:Aa

Transcription is performed by:DNA polymeraseRibosomeRNA polymeraseReverse transcriptase

Which statement is most accurate for the trait shown in the pedigree?The trait is recessiveThe trait is dominantThe trait could be either

Autosomal traits that appear in only one of the biological sexes are called:sex-limitedsex-linkedsex-influenced

You perform Chi-square tests on two sets of data. Set A has a Chi-square value of 6.85, while Set B has a Chi-square value of 0.05. Out of these two sets of data, which one has the higher P-value? (Assume that Sets A and B have the same degrees of freedom.)Set ASet BThe P-values will be the same

If two heterozygotes have 3 segregating gene pairs, how many genotypic and phenotypic classes will be observed?27 and 8 respectively8 and 27 respectively9 and 6 respectively6 and 9 respectively

If two organisms that are heterozygous for 3 segregating gene pairs mate with each other, how many genotypic and phenotypic classes will be observed in their offspring?27 and 8, respectively8 and 27, respectively9 and 6, respectively6 and 9, respectively

In the case of interacting genes, the gene that masks the expression of another gene is called the ___________ gene.limnostaticepistatichypostatichyperstatichomostatic

Which of the following is true about the SRY gene in humans?It is present on the X chromosomeIt is present on the Y chromosomeIt is present on an autosome

X-linked traits are only expressed in males, not in females.TrueFalse

Two true-breeding mutant strains of Drosophila have black body color instead of the wild-type gray. When the two strains are crossed, all the F1 flies have wild-type body color. How can these data be interpreted?Recombination occurredComplementation occurredThe mutations involved are on two different genesBoth B and C

Could this trait be autosomal recessive?